If food waste were a country, it would be the third-highest greenhouse-gas emitting nation behind the US and China,The Guardian reports. That’s because 40% of all food grown in the world goes uneaten each year, according to a World Wildlife Fund report from last year. And when food ends up in landfills, it produces huge amounts of greenhouse gases.

So it’s no surprise then that apps designed to combat food waste – by giving consumers the opportunity to purchase leftover, expiring or misshapen food at discount prices – have become increasingly popular in recent years. Some of these apps have millions of users in the US, and are growing internationally. TikTok users often post videos of the food they have salvaged from restaurants through the apps, and a Reddit community with more than 12,000 members shares photos of their hauls.

“For me, the most impactful way to make a difference was really to enable every one of us to make a difference,” said Lucie Basch, co-founder of the app Too Good to Go. “The idea of the app, of technology in the digital world today, is that it connects each other to one another, and that’s your chance to really make a difference.”

To read the full story in The Guardian, please click here.