Here’s who won the 2022 Earthshot Prize in each category.

Protecting Nature

A company from India called Kheyti won in this category for its Greenhouse-in-a-Box. The greenhouse protects crops from severe weather and harmful insects so farmers have more to sell and can make more money to feed their families. Crops grown in the greenhouse also require less water than crops that are out in the open. 

Cleaning Our Air

Charlot Magayi of Kenya won for inventing a type of stove that’s safer and creates less pollution than a stove that burns charcoal for fuel. Magayi’s company, Mukuru Clean Stoves, sells stoves that run on fuel made from charcoal, wood, and sugarcane. The stoves aren’t just cleaner than charcoal stoves—they’re also cheaper to buy. 

Saving Our Oceans

A group called the Queensland Indigenous Women Rangers Network (QIWRN) won in this category. QIWRN, which is based in Australia, has trained more than 60 Indigenous (Native Australian) women to be park rangers. The rangers collect information that helps protect the Great Barrier Reef, a huge group of coral reefs that are home to thousands of species of ocean life. 

Reducing Waste

Pierre Paslier and Rodrigo Garcia Gonzalez of the United Kingdom won for inventing a material that can be used instead of plastic. Their company, Notpla (short for “Not Plastic”), produces a plastic alternative that’s made from seaweed. The company is working on creating even more materials. Its goal is to reduce plastic waste, which often ends up polluting the oceans. 

Fixing Our Climate

A company called 44.01 won in this category for inventing a way to capture carbon dioxide, the main gas that’s contributing to climate change. The company removes carbon dioxide from the air by adding it to water and then pumping that water into cracks in a type of rock called peridotite. The carbon dioxide gets mineralized, meaning that it turns into rock. Once this happens, it won’t be released into the atmosphere again.