What if just 1 in 10 people changed how they eat, drive, heat or shop?

Climate change is often viewed as an issue that’s too big for individual action to matter. But calculations show that when personal choices add up, the impact can be significant.

The Associated Press looked at four everyday behaviors in the U.S. ranging from food and transportation to home energy and clothing. The question was then posed: What if just one in 10 Americans who currently eat beef, drive gasoline cars, heat their homes with natural gas or buy new clothes changed each of those habits?

To find out, the AP gathered data from federal agencies and other sources on each habit, then calculated how much emissions would be reduced if one out of every 10 users made a switch. The answer is tens, and in some cases hundreds, of billions of pounds of carbon pollution avoided each year.

Beef is one of the most carbon-intensive foods in the global food system because cattle emit methane and require vast amounts of land and feed, creating large amounts of climate pollution. Producing beef generates greenhouse gas emissions several times higher than chicken.

The recommended serving size of meat in the U.S. is 3 ounces (85 grams), according to the American Heart Association. Swapping one serving of beef that size for chicken once a week would cut about 10 pounds (4.54 kilograms) of carbon dioxide. Over 52 weeks in a year, that would equal a reduction of about 525 pounds (238 kilograms) of carbon dioxide per person per year.

About 74% of Americans eat beef at least once a week, according to a 2023 survey by The Associated Press-NORC Center for Public Affairs Research. If one out of every 10 of them — or about 25 million people — swapped just one beef meal a week for chicken, emissions would fall by about 13 billion pounds (roughly 6 million metric tons) of carbon dioxide each year. That change is roughly comparable to the annual emissions from nearly 1.3 million gasoline cars.

“Beef is a commonly consumed item that has one of the largest carbon footprints per pound,” said Dave Gustafson, project director at Agriculture & Food Systems Institute. “It is probably one of the largest individual choices that people make with regard to what they eat that has a direct impact on personal carbon footprint.”

According to the Environmental Protection Agency, transportation is one of the largest sources of direct greenhouse gas emissions in the U.S., and personal vehicles account for a major share of that total. Transportation accounts for 28% of total U.S. greenhouse gas emissions by economic sector.

The EPA says the average U.S. motorist drives 11,500 miles (18,507 kilometers) per year. The average gas powered car emits 400 grams (14 ounces) of carbon dioxide per mile, compared with about 110 grams (3.9 ounces) of carbon dioxide per mile for an electric vehicle. Driving an electric vehicle instead of a gas car cuts roughly 7,400 pounds (3,357 kilograms) of carbon dioxide per person annually, even after accounting for emissions from electricity generation.

If a number of Americans equal to 1 in 10 licensed drivers — or 23.77 million people — made that switch, the emissions savings would add up to roughly 175 billion pounds (roughly 79 million metric tons) of carbon dioxide every year, nearly 1.25% of total U.S. greenhouse gas emissions.

“If a large percentage of people changed a little bit of their travel, then all of a sudden the benefits are huge,” said Dillon Fitch-Polse, a professional researcher and co-director of Bicycling Plus Research Collaborative at the University of California, Davis.

At home, heating is often an invisible source of fossil fuel use. About 60 million U.S. households rely on utility natural gas furnaces, which burn fuel directly inside the home, according to the U.S Census Bureau's American Community Survey.

Replacing a gas furnace with an electric heat pump, which moves heat instead of generating it through combustion, cuts about 1,830 pounds (830 kilograms) of carbon dioxide per household per year.

If one in 10 households that heat their homes with natural gas switched to electric heat pumps, the result would be about 11 billion pounds (roughly 5 million metric tons) of carbon dioxide avoided annually, comparable to taking 1 million cars off the road.

“People’s homes are kind of like little fossil fuel power plants that people operate, and they just don’t realize that’s what they’re doing,” said Leah Stokes, associate professor of environment politics at the University of California, Santa Barbara. “That’s really the collective action thing is for people to understand that there is fossil fuel infrastructure right under their noses in their own homes.”

Clothing may seem minor next to cars or furnaces, but apparel has a significant carbon footprint.

A life cycle assessment by Levi Strauss & Co. estimates that producing a single pair of Levi's 501 jeans can emit more than 44 pounds (20 kilograms) of carbon dioxide, including manufacturing, packaging, transportation and retail.

If 34.2 million people — or the equivalent of 1 in 10 Americans — bought a pair of secondhand jeans this year instead of new ones, it would avoid roughly 1.5 billion pounds (roughly 0.7 million metric tons) of carbon dioxide, equivalent to the emissions of about 150,000 gasoline cars.

“What you can do is not throw in the trash,” said Constance Ulasewicz, consumer and family studies emeritus faculty and lecturer at San Francisco State University. “So it’s repairing your clothing so you can extend the life, and buying from a secondhand store.”

None of these actions alone can solve climate change, but together, the numbers show how quickly emissions add up or come down when millions of people move in the same direction.

The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.

FILE - Miranda Lewin shops for clothes at Pib's Exchange in Salt Lake City, Utah, April 15, 2022. (Laura Seitz/The Deseret News via AP)

FILE - Vehicles drive along a highway July 30, 2025, in Cincinnati. (AP Photo/Joshua A. Bickel, File)

FILE - A line cook slices beef brisket June 12, 2024, at a barbecue restaurant in Cincinnati. (AP Photo/Joshua A. Bickel, File)

FILE - A man eats a chicken wing June 12, 2024, at a barbecue restaurant in Cincinnati. (AP Photo/Joshua A. Bickel, File)

FILE - A driver waits in their car while charging their electric vehicles at an Electrify America station Oct. 9, 2024, in Seattle. (AP Photo/Lindsey Wasson, File)

HAVANA (AP) — Two Mexican Navy ships laden with humanitarian aid docked in Cuba on Thursday as a U.S. blockade deepens the island’s energy crisis.

The ships arrived two weeks after U.S. President Donald Trump threatened tariffs on any country selling or providing oil to Cuba, prompting the island in recent days to ration energy.

The Mexican government has said that one ship is carrying some 536 tons of food including milk, rice, beans, sardines, meat products, cookies, canned tuna, and vegetable oil, as well as personal hygiene items. The second ship is carrying just over 277 tons of powdered milk.

Mexican President Claudia Sheinbaum has said that while diplomatic maneuvering to resume oil supplies is underway, humanitarian aid would be sent. She said Thursday that as soon as the ships return, “we will send more support of different kinds.”

“We have stated to both the U.S. State Department and the U.S. Embassy in Mexico that Mexico is doing everything possible to foster a dialogue that, within the framework of Cuba’s sovereignty...creates the conditions for peaceful dialogue and ensures that Cuba, without any country imposing sanctions, can receive oil and its derivatives for its daily operations," she said.

Before Trump’s announcement, the state-owned oil company Petróleos Mexicanos, Pemex, had already suspended crude oil shipments to Cuba in January, although it has not clarified the reasons behind that decision.

Cuba relied heavily on oil shipments from Venezuela that were halted when the U.S. attacked the South American country in early January and arrested its leader.

Cuban President Miguel Díaz-Canel has called Trump’s threats an “energy blockade” and said it affects transportation, hospitals, schools, tourism and the production of food.

Cuban aviation officials warned airlines earlier this week that there isn’t enough fuel for airplanes to refuel on the island. On Monday, Air Canada announced it was suspending flights to Cuba, while other airlines announced delays and layovers in the Dominican Republic before flights continued to Havana. The cuts in fuel are expected to be another blow to Cuba's once thriving tourism economy.

Cuba also has reduced bank hours and suspended cultural events, while fuel distribution companies have said that sales only will be made in dollars and limited to 20 liters (5.28 gallons) per user.

In addition to severe blackouts, Cuban officials note that U.S. sanctions, which increased under Trump’s second term, cost the country more than $7.5 billion between March 2024 and February 2025.

Associated Press reporter Fabiola Sánchez in Mexico City contributed to this report.

Follow AP’s coverage of Latin America and the Caribbean at https://apnews.com/hub/latin-america

Felix Jose Morfi stands by his solar-powered water heater system he set up on his home's roof in Regla, Havana province, Cuba, Thursday. Jan. 29, 2026. (AP Photo/Ramon Espinosa)