Carbon removal

Carbon removal

A $100 million carbon-removal competition enters its final stage

The Elon Musk–backed Xprize competition announced 20 finalists to advance breakthrough solutions for CO2 removal using air, rocks, land, and oceans.

By Maria Gallucci  . 

Heirloom, an Xprize finalist, uses limestone to absorb CO2 from the air in Tracy, California. (Heirloom)