Tourism Drives Emissions Up, But Green Taxes Can Curb It

Tourism has long been celebrated as an engine of growth, jobs, and cultural exchange, but a new study suggests it carries a heavier atmospheric price than most policymakers realize. Research examining 36 OECD countries from 1980 to 2018 finds that tourism expansion significantly increases carbon emissions, confirming what energy analysts have suspected for decades: moving millions of people around the world is an intensely energy-hungry business. The study, published in Discover Sustainability, also delivers a more hopeful message. When environmental taxation is carefully designed and paired with renewable energy investment, it can blunt the emissions impact of tourism without dismantling the industry itself.

The research team, led by Hammed Musibau of Adelaide University’s School of Economics alongside Abdulrasheed Zakari, Felix Orole, and Vikniswari Vija Kumaran, set out to answer a deceptively simple question. Do green taxes and renewable energy actually work to cut carbon emissions in wealthy economies, or do they merely look good on paper? To find out, they assembled nearly four decades of data on tourism activity, energy consumption, taxation, and emissions across the OECD membership, the club of mostly high-income countries responsible for a disproportionate share of historical carbon output.

What makes the study technically notable is its treatment of model uncertainty. In long-run energy-environment research, analysts typically must choose one statistical specification from many plausible alternatives, and the choice itself can shape the conclusions. The team sidestepped this trap by deploying two complementary techniques: Bayesian Model Averaging and Weighted-Average Least Squares. Rather than betting on a single model, these methods evaluate the full space of candidate specifications and average the results, weighting each model by how well it fits the data. The upshot is that the reported relationships between tourism, taxation, renewables, and emissions are far less likely to be artifacts of an arbitrary modeling decision.

The headline finding is stark. Tourism expansion consistently and significantly increases carbon emissions across the OECD panel. The mechanism is intuitive once you unpack it. International arrivals require aviation, which remains one of the hardest sectors to decarbonize; hotel chains run energy-intensive heating, cooling, and laundry systems around the clock; cruise ships burn heavy fuel oil; and destination economies build roads, airports, and resorts whose construction is itself carbon-heavy. As tourist arrivals climb, so does the energy demand that underpins the entire travel economy, and in most OECD countries that demand is still met substantially by fossil fuels.

Renewable energy, by contrast, emerges as the study’s most reliable hero. Across all specifications and averaging techniques, green energy consumption consistently contributes to emission reductions. Every megawatt-hour of wind, solar, hydro, or geothermal power that displaces fossil generation shaves emissions directly, and the effect holds regardless of income level or tourism intensity. For the authors, this underscores a central policy point: renewable deployment is not merely a climate accessory but the backbone of any credible decarbonization strategy, particularly in economies whose service sectors, including tourism, keep expanding.

Environmental taxation tells a more complicated story. When considered in isolation, green taxes do not consistently reduce emissions across OECD countries. The authors attribute this disappointing record to two structural weaknesses. First, tax exemptions carve out large chunks of the taxable base, often for politically powerful industries such as aviation fuel, shipping, and energy-intensive manufacturing. Second, enforcement is uneven, so the effective tax rate faced by polluters varies widely even within the same jurisdiction. A carbon price that half the economy can dodge is, in effect, not much of a price at all.

Yet the picture changes dramatically when taxation is examined in interaction with tourism. The study finds that the combination of tourism activity and environmental taxation reveals that well-designed fiscal instruments can mitigate tourism-induced emissions. In other words, a green tax that appears ineffective on average may work precisely where the emissions pressure is greatest, discouraging carbon-intensive travel patterns, nudging airlines and hotel operators toward efficiency, and channeling revenue into cleaner infrastructure. Design matters: broad bases, minimal exemptions, and credible enforcement transform a symbolic levy into a genuine behavioral signal.

Income level adds another layer of nuance. The analysis shows that environmental taxes are effective in reducing emissions in high-income OECD economies, while their impact remains insignificant in upper-middle-income countries within the panel. The authors suggest several plausible explanations. Wealthier economies tend to have mature tax administrations, higher capacity to monitor and penalize noncompliance, and industrial structures more amenable to switching toward cleaner technologies in response to price signals. In upper-middle-income settings, weaker enforcement capacity and a heavier reliance on exemptions can neutralize the intended incentive, leaving the tax as a revenue instrument rather than an emissions instrument.

For policymakers, the study’s synthesis is clear. Fiscal instruments and energy-transition policies should not operate on separate tracks. A carbon tax works best when the taxed economy has genuine alternatives to fossil energy, which means renewable investment must scale alongside taxation. Conversely, renewables flourish fastest when carbon prices make fossil alternatives progressively more expensive, generating both the incentive and, through tax revenue, some of the funding for the transition. The authors argue that integrating environmental taxation with renewable energy investment produces carbon mitigation strategies that align fiscal tools with long-term sustainability objectives rather than treating each policy as a standalone fix.

The timing of these findings could hardly be more relevant. Tourism has rebounded strongly since the pandemic, international arrivals are climbing back toward and beyond pre-2020 levels, and OECD governments face mounting pressure to honor net-zero commitments while protecting a sector that employs hundreds of millions of people worldwide. The research offers a technical but actionable roadmap: broaden green tax bases, close exemptions, strengthen enforcement, and pour the resulting revenue and political capital into renewable energy. Done well, the study suggests, the world can keep welcoming travelers without mortgaging the climate. Done poorly, tourism’s carbon bill will keep rising, and green taxes will remain what they too often are today: well-intentioned instruments with well-documented escape hatches.

Subject of Research: Tourism, green energy, and environmental taxation effects on carbon emissions in OECD countries

Article Title: Tourism, green energy, and environmental taxation effects on carbon emissions in OECD countries

Article References: Musibau, H., Zakari, A., Orole, F., & Kumaran, V. V. (2026). Tourism, green energy, and environmental taxation effects on carbon emissions in OECD countries. Discover Sustainability. https://doi.org/10.1007/s43621-026-04342-y

Image Credits: AI Generated

DOI: 10.1007/s43621-026-04342-y

Keywords: Tourism, green, energy, environmental, taxation, effects, carbon, emissions, OECD, countries, scientific research