The Effect of Sustainable Marketing on Consumer Purchase Intention

Background to the Study

Marketing as a business discipline has continued to evolve in response to changing consumer values, regulatory pressures, and global environmental realities. Over the last two decades, growing concern over climate change, resource depletion, pollution, and the broader consequences of unchecked industrial production has pushed sustainability from the periphery of corporate strategy to the centre of marketing thought and practice. Sustainable marketing, often used interchangeably with green marketing, refers to the process of planning, developing, and executing marketing programmes that satisfy consumer needs while simultaneously minimising negative environmental and social impact across the product life cycle. It extends beyond conventional marketing by embedding ecological and ethical responsibility into product design, pricing, promotion, and distribution decisions.

Globally, consumers are becoming more conscious of the environmental footprint of the goods and services they consume. This shift in consumer consciousness has been driven by factors such as increased media coverage of environmental disasters, government regulation, non-governmental organisation advocacy, and the visible effects of climate change on everyday life. In response, many multinational and indigenous firms have adopted sustainability as a strategic marketing tool, ranging from the use of biodegradable packaging and energy-efficient production processes to cause-related marketing campaigns that highlight a brand's environmental and social commitments.

In the Nigerian context, the fast-moving consumer goods sector, comprising food and beverage, personal care, household, and related product categories, has witnessed a gradual but observable shift toward sustainability messaging. Several multinational and indigenous FMCG brands have begun to incorporate environmental themes into their product development and communication strategies, ranging from recyclable packaging initiatives to water conservation and community sustainability programmes. This shift takes place against a regulatory backdrop shaped by the National Environmental Standards and Regulations Enforcement Agency (NESREA), the federal body responsible for enforcing environmental laws, standards, and regulations in Nigeria. However, the extent to which these sustainability-oriented marketing efforts actually translate into consumer purchase intention, particularly within urban markets such as Enugu metropolis, remains empirically underexplored.

Purchase intention, a key construct in consumer behaviour literature, represents the likelihood that a consumer will buy a particular product or patronise a particular brand. It is widely regarded as a reliable proxy for actual purchase behaviour and is influenced by a combination of cognitive, affective, and situational factors. While a considerable body of international literature suggests a positive relationship between sustainable marketing practices and consumer purchase intention, scholars have also identified a persistent attitude-behaviour gap, in which consumers express positive attitudes toward sustainability but do not always translate such attitudes into actual purchase decisions, particularly where green products are perceived as more expensive or less effective than conventional alternatives. It is against this backdrop that this study investigates the effect of sustainable marketing, operationalised through green product strategy, green promotion, and green pricing, on consumer purchase intention among consumers of FMCG brands in Enugu metropolis, while also examining the moderating role of environmental consciousness in this relationship.

Statement of the Problem

Despite the increasing adoption of sustainability themes in marketing communication by firms operating in Nigeria, there is limited empirical clarity on whether these efforts meaningfully influence consumer purchase intention within the domestic market. Several FMCG firms have invested substantially in green product reformulation, eco-labelling, and sustainability-themed advertising campaigns, yet anecdotal evidence and informal market observation suggest that price sensitivity, limited consumer awareness, and scepticism toward corporate sustainability claims, often referred to as greenwashing, continue to undermine the effectiveness of such strategies.

Furthermore, much of the existing literature on sustainable marketing and consumer purchase intention originates from developed economies with markedly different regulatory environments, income levels, and consumer awareness structures, raising questions about the applicability of these findings to an emerging market context such as Nigeria. Within Nigeria itself, empirical studies that specifically examine how green product strategy, green promotion, and green pricing jointly influence purchase intention, and how environmental consciousness moderates this relationship, remain scarce, particularly with respect to Enugu metropolis, a fast-growing commercial hub in South-East Nigeria. This gap creates a problem for marketing practitioners who require empirical guidance on whether and how sustainability investments influence consumer behaviour, and for policymakers seeking to encourage sustainable consumption patterns. It is this problem that the present study sought to address by empirically examining the effect of sustainable marketing on consumer purchase intention among FMCG consumers in Enugu metropolis.

Aim and Objectives of the Study

The aim of this study was to examine the effect of sustainable marketing on consumer purchase intention, using selected fast-moving consumer goods brands in Enugu metropolis as a case study. The specific objectives were to:

●        Examine the effect of green product strategy on consumer purchase intention.

●        Determine the effect of green promotion (eco-labelling and green advertising) on consumer purchase intention.

●        Assess the effect of green pricing on consumer purchase intention.

●        Evaluate the moderating role of environmental consciousness on the relationship between sustainable marketing and consumer purchase intention.

Research Questions

●        What is the effect of green product strategy on consumer purchase intention?

●        What is the effect of green promotion (eco-labelling and green advertising) on consumer purchase intention?

●        What is the effect of green pricing on consumer purchase intention?

●        To what extent does environmental consciousness moderate the relationship between sustainable marketing and consumer purchase intention?

Significance of the Study

This study is significant to a number of stakeholders. To marketing practitioners and brand managers within the FMCG sector, the findings offer empirical guidance on which dimensions of sustainable marketing most strongly influence purchase intention, enabling more efficient allocation of marketing resources. To policymakers and regulatory bodies, the study provides evidence that may inform consumer protection and environmental disclosure policies, particularly around eco-labelling standards.

To the academic community, the study contributes to the relatively limited body of empirical literature on sustainable marketing within emerging African markets, and offers a contextualised framework that future researchers may adapt or extend. Students designing similar moderated-regression studies can find additional structural guidance through ScholarNestHub's research coaching service, which supports learners refining their proposals, questionnaires, and analysis chapters. Finally, the study is of value to consumers themselves, as it raises awareness of how sustainable marketing strategies are designed to influence purchasing behaviour, thereby supporting more informed and conscious consumption decisions.

Scope of the Study

This study is delimited in three respects. Conceptually, it focuses on three dimensions of sustainable marketing, namely green product strategy, green promotion, and green pricing, as they relate to consumer purchase intention, with environmental consciousness examined as a moderating variable. Geographically, the study is restricted to consumers of fast-moving consumer goods brands within Enugu metropolis, Enugu State, Nigeria. Time-wise, the study relies on cross-sectional survey data collected within a defined period during the course of the research and does not track changes in consumer attitudes over an extended time horizon.

As with most survey-based research, this study is subject to certain limitations. First, the use of self-reported data raises the possibility of social desirability bias, as respondents may overstate their environmental concern or purchase intention. Second, the study's cross-sectional design captures consumer perceptions at a single point in time and cannot fully account for changes in attitudes or market conditions over time. Third, the findings, being restricted to Enugu metropolis and the FMCG sector, may not be fully generalisable to other geographic zones or industry sectors without further empirical validation. Notwithstanding these limitations, reasonable methodological safeguards, including a validated research instrument and appropriate statistical analysis, were adopted to enhance the reliability and usefulness of the findings.

Operational Definition of Terms

Sustainable Marketing: The planning, implementation, and control of marketing programmes that meet consumer needs while minimising negative environmental and social impact.

Green Product Strategy: The deliberate design, development, and positioning of products with environmentally friendly attributes, such as recyclable packaging or biodegradable materials.

Green Promotion: Marketing communication activities, including advertising, eco-labelling, and sustainability campaigns, that highlight the environmental benefits of a product or brand, standards for which are set out internationally in frameworks such as ISO 14021 on self-declared environmental claims.

Green Pricing: The pricing strategy adopted for environmentally sustainable products, including considerations of premium pricing and price transparency regarding sustainability costs.

Consumer Purchase Intention: The self-reported likelihood that a consumer will purchase, repurchase, or recommend a particular product or brand.

Environmental Consciousness: The degree to which an individual is aware of, and concerned about, environmental issues and the impact of consumption on the environment.

Conclusion

Sustainability claims alone don't move products off shelves, but this study's findings show that sustainable marketing, when it shows up consistently across product design, promotion, and pricing, does meaningfully shift purchase intention, especially among environmentally conscious consumers. The practical lesson for FMCG firms is that green strategy works best as a coordinated effort rather than a single eco-label slapped on packaging. Researchers exploring related themes in green marketing, consumer behaviour, or sustainability can find further sample studies in ScholarNestHub's project topics library, spanning marketing, computer science, and public administration.

Frequently Asked Questions

1. What is sustainable marketing?

Sustainable marketing, often used interchangeably with green marketing, is the planning, implementation, and control of marketing programmes that meet consumer needs while minimising negative environmental and social impact across the product life cycle.

2. Does green product strategy actually influence purchase intention?

Yes. Research in this area finds that green product strategy, such as recyclable packaging or biodegradable materials, has a positive and statistically significant effect on consumer purchase intention.

3. Does eco-labelling and green advertising work?

Studies show that green promotion, including eco-labelling and green advertising, has a significant positive effect on purchase intention, though its effectiveness depends heavily on how credible consumers perceive the claims to be.

4. Are consumers willing to pay more for green products?

Green pricing has a positive and statistically significant effect on purchase intention in this research, though the attitude-behaviour gap means some consumers who express environmental concern still hesitate when green products carry a noticeable price premium.

5. What is the attitude-behaviour gap in sustainable marketing?

It refers to the well-documented pattern where consumers express positive attitudes toward sustainability but do not always translate those attitudes into actual purchase decisions, particularly when green products are perceived as more expensive or less effective than conventional alternatives.

6. How does environmental consciousness affect this relationship?

Environmental consciousness significantly moderates the relationship between sustainable marketing and purchase intention, meaning consumers who are more aware of and concerned about environmental issues respond more strongly to green marketing efforts.

7. What research methodology suits a study like this?

A descriptive survey design is common, using a structured Likert-scale questionnaire administered to consumers of a defined product category, with sample size determined through a formula such as Taro Yamane's, and analysed using multiple regression analysis.

8. What regulatory body oversees environmental standards in Nigeria?

The National Environmental Standards and Regulations Enforcement Agency (NESREA) is the federal body responsible for enforcing environmental laws, standards, and regulations in Nigeria, including matters relevant to sustainability claims in marketing.

9. What can FMCG firms do to strengthen green marketing effectiveness?

Recommended practices include investing in credible, verifiable eco-labelling, maintaining transparent green pricing that explains any premium, and investing in sustainability education to build consumer trust and awareness over time.

10. Where can I find a sample project on this topic for reference?

ScholarNestHub's marketing project library includes related sample studies on green marketing, branding, and consumer behaviour that can serve as structural and methodological references for students developing their own research.