1. Introduction
The effects of global warming include: polar melting, sea level inundation of low-lying coastal lands, global climate change, resulting in heavy rains, droughts and even desertification [
1,
2]. Global warming threatens the ecosystem, food chain, water resources, human activities and life safety [
3,
4]. The main cause of warming is the emission of greenhouse gas, especially direct or indirect human emissions of carbon dioxide [
5]. Carbon Brief, an organization that studies climate change, points out that most of the greenhouse gas emissions come from the combustion process of fossil energy and the manufacturing process of non-green products [
6,
7,
8]. To provide for the diverse needs of the world’s 8 billion people, climate and environmental quality pay a heavy price. One of the main culprits is non-green products, so it is very important to promote green products. Green products are products that require less physical resources to manufacture [
9] and energy [
10]. After the product is sold to the consumer, it will eventually go back to the producer [
11]. The design must prohibit or restrict the use of toxic substances, consider the recyclability of waste, the proportion of recycling, durability, and maintainability [
12,
13]. In order to promote the production and sale of green products to reduce the carbon emissions of enterprises and the impact of production lines on the environment, as well as to improve energy efficiency, the United Nations Environment Programme (UNEP) released Who cares wins. The report mentions that operators or investors should not be obsessed with profit while ignoring their responsibilities. It is also clearly pointed out that companies should pay attention to ESG, which are Environmental Protection, Social Responsibility and Corporate Governance [
14]. Among them, environmental protection includes the norms to be considered in the design and manufacture of green products.
Although the United Nations Environment Programme (UNEP) and various environmental NGOs around the world have called for and promoted the production and marketing of green products [
15,
16]. However, the study also pointed out that the proportion of consumers actually buying green products is still not high [
17]. For example, Park and Lin [
18] pointed out that many consumers have a positive attitude towards green, sustainable products, and their consumer awareness has indeed increased. Also, Tanuwijaya and Balqiah [
19] discovered that even though the Indonesian government has enacted regulations to reduce the price and tax rate of EVs, and consumers have high expectations for reducing air pollution, there has been no significant improvement in the penetration of EVs in Indonesia. There are many more studies providing similar results [
20,
21,
22]. There are even some companies or organizations that invest a lot of money in image advertising in the name of environmental protection, instead of investing resources in the design and manufacture of green products, in order to meet the requirements of environmental regulations or just to meet the environmental awareness of consumers. This phenomenon is known as Greenwashing [
23,
24]. These studies show that ESG’s focus on sustainable corporate development, rising consumer awareness, and governmental environmental regulations are leading companies to transform their production of green goods. However, the design and manufacturing of green goods require higher costs, and higher costs will inevitably lead to higher prices and lower product competitiveness. In order to prevent enterprises from being reluctant to switch to green goods production due to higher costs, or to make greenwashing behavior in order to meet the requirements of environmental protection regulations, the most direct solution is to Increase consumers’ purchasing behavior of green goods, which in turn increases enterprises’ willingness to produce green goods, make enterprises, consumers and environmental protection win-win.
The Theory of Planned Behavior (TPB) proposed by American psychologist Ajzen [
25] suggests that an individual’s specific behavior is influenced by his or her behavioral intention. Therefore, this study proposes to enhance the intention to re-purchase green goods according to TPB. Many studies have mentioned how to increase the purchase intention of products. First, Wibowo, et al. [
26] empirical study confirms that Social Media Marketing Activity (SMMA) positively and significantly affects consumers’ purchase intention. Many studies have addressed how to increase product purchase intention. First, empirical research confirms that Social Media Marketing Activity (SMMA) positively and significantly affects consumer purchase intention. Sanchez and Lacap [
27] showed that the millennials’ green values influence their green purchase intention. Secondly, Sanchez and Lacap [
27] stated that the increase in environmental concerns among students of Azad Islamic University of Yazd will increase their attitude towards green products and thus increase their purchase demand for green products. Furthermore, Situmorang [
28] mentioned that brand image has a moderating effect on the repurchase intention of green brand positioning goods and green brand attitude. In addition, Aziz and Ahmed [
29] suggested that the level of brand involvement of customers affects their brand engagement and through that brand engagement affects their purchase intention of the product.
The mentioned studies show that social media marketing activities, green values, environmental concerns, brand image, and brand involvement are significantly associated with repurchase intention (RI) or purchase intention. Although the mentioned research context is different from the green brand industry, these variables may also have a causal relationship in the green brand industry. Therefore, this study armed the members of social media green product groups in Taiwan as the target population, with social media marketing activities as the independent variable and green values, environmental concerns, brand image, and brand involvement as the mediating variables, to investigate their effects on the repurchase intention of green goods. The research data will be collected through questionnaires, and the results will be analyzed by statistical methods to test whether the research hypotheses are valid. Based on the results of the study, we will provide practical suggestions to the enterprises, relevant organizations and government for promoting green products in Taiwan, as well as references for subsequent related studies.
3. Methodology
3.1. Conceptual Framework
In this study, repurchase intention was used as the dependent variable, social media marketing activities as the independent variable, and green values, environmental concern, brand image, and brand involvement as the mediating variables to investigate their effects on the repurchase intention of green products. Based on the literature review, the conceptual framework of this study is drawn as Figure 3-1.
Figure 3-1.
Conceptual Framework.
Figure 3-1.
Conceptual Framework.
3.2. Research Subjects and Data Collection
This study investigates the repurchase intention factors of members of social media green product groups in Taiwan. The survey was conducted by means of an online electronic questionnaire, and research data were collected. The period of distribution is 2022/11/01~2022/11/30, a total of xx questionnaires were collected. After removing invalid questionnaires, the total number of valid questionnaires is xx. According to Creative Research Systems [
109], with a statistical confidence level of 95% and a confidence interval of 5%, for the total population of Taiwan, a sample size of 384 was required. The sample for this study met the requirement.
3.3. Measurement
The scale investigated the basic personal information of the study subjects, including gender, marriage, education level, and monthly income. A five-point Likert scale was also used to measure their opinions on all study variables ranging from strongly disagree (1) to strongly agree (5). After the scale questions were designed, experts and scholars were invited to review the questions and give their opinions.
3.3.1. Social Media Marketing Activities Scale
The social media marketing campaign scale was referenced to the same constructs of the Wibowo, Chen, Wiangin, Ma and Ruangkanjanases [
26] and Ebrahim [
110] studies. Both studies categorize social media marketing activities into five subcomponents: entertainment, interaction, trending, customization, and word-of-mouth, based on Kim and Ko [
34]. Among them, Wibowo, Chen, Wiangin, Ma and Ruangkanjanases [
26] investigated the effect of social media marketing activities and customer experience on purchase intention. Ebrahim [
110] examined the impact of social media marketing campaigns on brand loyalty through brand trust and brand equity. The social media marketing activity scale was adapted to the context of this study to include questions such as “I buy green products on social media because the content is interesting”, “I buy green products on social media because it allows me to share information with others”, and “I am willing to pass on information about green brands and green products/services on social media to my friends”. A total of eleven items were developed.
3.3.2. Green Values Scale
The green values scale refers to Dumont, et al. [
111] individual green values and Chou [
112] personal environmental norms scale. In this study, the green values scale was adapted to the study context to include questions such as “I feel obligated to conserve energy as much as possible”, “I feel morally obligated to conserve energy regardless of what others do”, and “I should do my best to reduce energy use”. A total of five items were developed.
3.3.3. Environmental Concern Scale
The environmental concern scale was referenced from Pattanapomgthorn, et al. [
113] and Yadav and Pathak [
114] for the same construct name environmental concern scale. In this study, the environmental concern scale was adapted to the study context to include questions such as “When humans interfere with nature, there are often disastrous consequences”, “Humans must live in harmony with nature in order to survive”, and “Humans are seriously abusing the environment”. A total of five items were developed.
3.3.4. Brand Image Scale
The brand image scale was referenced from Gómez-Rico, et al. [
115] and Gomez, et al. [
116] for the same construct name brand image scale. In this study, the brand image scale was modified according to the study context to include questions such as “I think green brand products have high quality”, “I think green brand products have high competitiveness” and “I think green brand products are attractive”. A total of five items were developed.
3.3.5. Brand Involvement Scale
The brand involvement scale was referenced from Duong, et al. [
117] and Leckie, et al. [
118] for the same construct name brand involvement scale. In this study, the brand involvement scale was adapted to the study context to include questions such as “I think I must buy green brand products because of my personal attitude”, “I think I must buy green brand products because of my personal values” and “When buying a product, I think it is very important that the product is a green brand”. A total of five items were developed.
3.3.6. Repurchase Intention Scale
The repurchase intention scale was referred to Ali and Bhasin [
104] and Tandon, et al. [
119] for the same construct name repurchase intention scale. In this study, the repurchase intention scale was adapted to the study context to include questions such as “I intend to continue buying green brand products”, “I intend to give preference to green brand products in my future purchases”, and “I intend to recommend green brand products to others. A total of five items were developed.
3.4. Data Analysis
In this study, the questionnaires were analyzed, descriptive statistics and inferential statistics were examined by SPSS 23.0 for the valid samples collected. The data analysis methods include the frequency distribution analysis, the distribution and percentage of the number of times the sample was obtained by gender, marriage, education level, and month. Then, the mean and standard deviation of each component will be calculated to understand the degree of concentration of each variable. After that, the reliability analysis of the questions and constructs will be examined through the confirmatory factor analysis. The convergent and discriminate validity will be tested. Finally, the structural equation modeling will be conducted to examine the modal fit, the direct effect, and the mediating effects, respectively.
5. Discussion and Conclusion
This study uses social media marketing activities as independent variables and green values, environmental concerns, brand image, and brand involvement as mediating variables to investigate their effects on the repurchase intention of green products. The research model and related direct and indirect hypotheses are proposed. After collecting data from the questionnaire survey, the model was tested and the hypotheses were verified using Structural Equation Modeling
5.1. Theoretical Contributions
After empirical analysis, the results of this study validate that social media marketing activities positively affect the green values of their members; these two direct effects are consistent with the results of previous studies by McQueen and Turner [
52] and Kane, Chiru and Ciuchete [
53]. In addition, social media marketing activities positively affect the environmental concerns of their members; these two direct effects are similar to the results of previous studies by Farhat, Aslam and El Alfy [
68] and Ali, Ullah, Ahmad, Cheok and Alenezi [
69]. Furthermore, social media marketing activities positively affect the brand image of green products; these two direct effects are similar to the results of previous studies by Sanny, Arina, Maulidya and Pertiwi [
78] and Jasin [
79], respectively. The direct hypotheses on brand involvement of green products were examined as follows. First, social media members’ green values positively affect their brand involvement in green products; these two direct effects were found to be the same or similar to the results of previous studies by Khare, Sadachar and Manchiraju [
87] and Rizomyliotis, Poulis, Konstantoulaki and Giovanis [
88], respectively. Second, the environmental concerns of social media members positively influence their brand involvement in green products; these two direct effects were found to be similar to the findings of previous studies Huang, Yang and Wang [
90] and Tucker, Rifon, Lee and Reece [
91], respectively. Furthermore, the brand image of green products positively influences consumers’ brand involvement in green products; these two direct effects were found to be similar to the results of previous studies Bouhlel, Mzoughi, Hadiji and Slimane [
93] and Gorgulu [
95], respectively. In terms of mediating effects, green values, environmental concerns, and brand image mediated the relationship between social media marketing activities and brand involvement. Moreover, brand involvement mediated the effect between green values, environmental concern, brand image, and repurchase intention; all were similar to the results of previous studies.
5.2. Practical Contributions
The results of the study showed that social media marketing activities positively influenced group members’ green values, environmental concerns, and brand image of green products. Green product group members will increase their green values and environmental concerns through various green product marketing and promotion contents of the group, including interactive, cooperative, or sharing activities, and then increase their intention to repurchase green products through the mediation of brand involvement. Therefore, this study proposes the following practical directions to strengthen social media marketing activities, green values, environmental concerns, the brand image of green products, and green brand involvement to increase the repurchase intention of green products.
First, this study proposes to involve green values, environmental concerns, the brand image of green products, and green branding in social media marketing activities. Providing data on the environmental friendliness of green products, the use of no or less non-recyclable raw materials, the confidence of consumers in green products, the manufacturing, design, and raw material compliance, the recycling mechanism at the end of product life, the flat packaging to save on shipping costs, and to let consumers know that companies are committed to reducing carbon emissions. In addition, through the social media video, it promotes respect for nature, enough to replace more, protection of diversity, design according to nature, and consequences of disrespecting nature; and asks members what they think and whether they want to see the sequel. Ask open-ended environmental questions that will start a dialogue. For example, what green products are you most interested in? Invite a friend to a green product event and get an extra bonus. In addition, green product enterprises, community group administrators, and stakeholders must set an example of environmental protection and encourage social media members to engage in environmentally concerned behavior. Through social media marketing activities to strengthen the intention of re-purchasing green products, we not only let the group members consider green and environmental protection as an attitude of life but also promote the concept of coexistence with nature.
Second, recruiting channels in social media. After promoting the company’s commitment to energy saving and environmental protection, and gaining the approval of social media group members, we can recruit like-minded channels. By allowing suppliers who are willing to invest in improving the environment and equipment to join the green supply chain, we may get more orders and more sales. By promoting corporate green initiatives, we can create more business opportunities. More companies will invest in it. In this way, more people will understand that energy saving and environmental protection are not contrary to each other, but rather complementary, thus creating a four-win situation for enterprises, suppliers, consumers, and the environment.
Third, the green enterprise should recruit social media digital influencers and key opinion leaders to help promote green products. Green products can use the charisma and influence of digital influencers and key opinion leaders to create momentum for green brands and achieve marketing goals. The community can first hold a poll to select the green key opinion leaders and invite them to present an easy-to-understand green point of view after training but in the interest of the environment. Green key opinion leaders must use products that have obtained the green label and the carbon footprint label in real life. Through the promotion of social media digital influencers and key opinion leaders, not only can the green products reach more social consumers quickly and effectively, but also attract public attention to the green brand. This will enhance the company’s green reputation and build up a green trust relationship with consumers in the community.
5.3. Limitations and Future Research
This study focuses on the members of green product social media groups in Taiwan and will be expanded to include other social media groups in the future. For example, we will include members of environmental protection, resource recycling, minimalism, earth care, second-hand goods, energy saving, and carbon reduction groups as research subjects. The study will also compare the impact of different types of social media groups on green and environmental protection-related intentions. Secondly, the identity of community group members may affect their willingness to fill out the questionnaire, for example, group administrators and members who are more frequently involved in group activities may be more willing to fill out the questionnaire, which may affect the validity of the results. In addition, this study focuses on the intention to repurchase green products. Due to the time constraints of this study and the fact that all the variables used in this study are positive factors, the results of this study may not present the reasons for the reduction of intention to repurchase green products. In the future, the negative impact will be investigated using the suppressed green intention variable and a more detailed sampling method will be used.
Author Contributions
Conceptualization, C.M., T.L. and C.H.; methodology, C.H.; software, C.H.; validation, C.M., T.L. and C.H; formal analysis, C.H.; investigation, C.H.; data curation, C.H.; writing—original draft preparation, C.H.; writing—review and editing, C.M., T.L. and C.H; visualization, C.H. All authors have read and agreed to the published version of the manuscript.