There’s no doubt that our furry friends are good for us. Studies have shown that living with a dog or cat can reduce stress, boost our immune systems, and increase our overall happiness. But what’s good for humans is not always good for the planet. A study published in the journal PLOS One finds that meat consumption by pet dogs and cats creates 64 million tons of carbon dioxide each year.
Meat production requires more energy and resources than plant-based foods. It also produces more waste.
Gregory Okin of UCLA’s Institute of the Environment and Sustainability is a geographer by trade. He studies the way weather events and climate patterns can affect ecosystems, and vice versa. One day he found himself puzzling over the ecological ramifications of the current craze for backyard chickens.
“I was thinking about how cool it is that chickens are vegetarian and make protein for us to eat, whereas many other pets eat a lot of protein from meat,” he said in a study. “And that got me thinking—how much meat do our pets eat?”
Okin started by considering the number of dogs and cats in the country—approximately 163 million. He then analyzed the amount of meat in the most popular pet food brands, and compared this to the amount of meat American humans consume each year.
The results suggest that our pets represent a huge portion of the meat we produce, eat, and excrete every year. Okin’s calculations show that American dogs and cats consume 19 percent as many calories as the country’s 321 million humans—an intake comparable to the population of France.
But pound for pound, pet food also contains more meat than human food. When Okin adjusted for this fact, he found that dogs and cats gobble up 25 percent of our annual meat-based calorie intake. That results in the production of 64 million tons of carbon dioxide a year—about the same output as 13.6 million humans driving their cars for a year.
If our dogs and cats constituted their own country, they’d rank fifth in global meat consumption, behind only Russia, Brazil, China, and the United States.
“I’m not a vegetarian, but eating meat does come at a cost,” Okin said in a statement. “Those of us in favor of eating or serving meat need to be able to have an informed conversation about our choices, and that includes the choices we make for our pets.”
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