Nearly Half of Americans Open to Plant-Based Diets to Fight Climate Change, New Survey Finds

‘‘Switching to a plant-based diet is one of the most powerful choices anyone can make to cut emissions. Animal agriculture drives deforestation, heats the planet, and wastes precious resources. Choosing plants over animals offers a real path toward a livable future.’’

A new survey has revealed that nearly half of Americans would consider switching to a plant-based diet to help curb the emissions crisis fueled by food production.

The survey, conducted in March by the Physicians Committee for Responsible Medicine (PCRM), polled 2,203 U.S. adults about their views on eating habits and climate responsibility. Sixteen percent of respondents said they would “strongly” consider adopting a plant-based diet to cut greenhouse gas emissions, while another 30 percent said they would “somewhat” consider it.

This marks an important shift in public sentiment. Food production, particularly animal agriculture, has long been identified as a major contributor to global heating. Yet, until recently, public awareness of the link between what is on our plates and the climate crisis has lagged behind the urgency expressed by scientists and climate advocates.

A Broken System: How Food Production Heats the Planet

The current food system is not only environmentally unsustainable, it is deeply inefficient. Animal agriculture is among the most significant drivers of emissions, biodiversity loss, and deforestation.

While estimates vary slightly depending on the methodology, it is widely agreed that the global food system accounts for a significant portion of overall emissions. Animal agriculture alone is responsible for at least 16.5 percent of all global emissions according to the most conservative estimates. Some recent research pushes that figure even higher when indirect factors like deforestation and methane production are included.

In fact, a major study published earlier this year offered a stunning conclusion: animal agriculture has been responsible for around 53 percent of the global average temperature rise between 1750 and 2020. If accurate, this finding positions animal farming not just as a significant factor, but as the leading cause of historical climate heating.

Despite these grim realities, the structure of global agriculture remains largely unchanged. Enormous resources of land, water, and crops are devoted to raising animals, many of whom are ultimately consumed in forms that offer poor efficiency compared to plant-based foods.

Public Awareness Gaps Persist

Even though public willingness to act appears to be growing, knowledge gaps about the climate impact of different foods remain significant.

PCRM’s survey revealed that 54 percent of respondents were unaware of which foods contribute the most to emissions. However, when prompted to rank various food items by their emissions impact, a slim majority — 54 percent — correctly identified beef as the worst offender.

This is an important point. Beef production is uniquely destructive. It generates around 70 kilograms of greenhouse gas emissions for every kilogram of protein produced. By contrast, plant-based sources of protein such as lentils or beans have a fraction of that footprint.

Beef production is also deeply entangled with deforestation, particularly in critical regions like the Amazon rainforest. Expanding cattle pastures often involves clearing vast swaths of forest, sometimes illegally, leading not just to biodiversity collapse but to land conflicts and human rights violations against Indigenous peoples.

Americans Are Thinking About Climate More Than Ever

While it can be tempting to focus only on the discouraging statistics, there is hope in this survey’s findings.

The fact that nearly half of the adult U.S. population is open to making a major dietary shift for the planet should not be overlooked. This represents a profound change in public thinking compared to just a decade ago, when plant-based diets were largely niche and often ridiculed in mainstream culture.

Climate events — from wildfires to extreme storms — have become too devastating and too frequent to ignore. More Americans than ever understand that personal choices matter, even when system-wide change is urgently needed.

Food is one area where individual action can directly reduce emissions. According to researchers at the University of Oxford, adopting a vegan diet could cut an individual’s food-related carbon footprint by up to 73 percent. Shifting to mostly plant-based eating is often described by experts as one of the most effective lifestyle changes a person can make for the planet.

Barriers to Change: Culture, Misinformation, and Accessibility

Still, even among those willing to consider a change, barriers remain.

American culture has long celebrated meat consumption as a symbol of prosperity, strength, and even patriotism. Food advertising heavily reinforces these ideas, often framing meat-eating as natural or necessary, despite clear evidence to the contrary.

Meanwhile, misinformation campaigns funded by industry groups have worked hard to sow doubt about the environmental and health benefits of plant-based diets. The average consumer is often bombarded with conflicting messages, leaving many confused or defensive.