A direct-air-capture plant in Iceland with mountains in the distance.
Climeworks' second and largest direct-air-capture plant in Iceland.
  • Climeworks' direct-air-capture plant can remove up to 36,000 metric tons of carbon from the air a year. 
  • Carbon removal is becoming a key climate technology because the world isn't cutting emissions fast enough.
  • The tech is still in its early stages and expensive, ranging from $600 to $1,000 per ton of carbon.

The startup Climeworks this week switched on the largest direct-air-capture plant, which pulls carbon dioxide from the sky and locks it away underground.

Climeworks said the plant, called Mammoth, has about 10 times the capacity of its first facility and could capture up to 36,000 metric tons of carbon emissions a year once it's completed.