First ice-free day in the Arctic may arrive in 2027

Researchers have used computer models to forecast when the Arctic Ocean might experience its first ice-free day. 

The line for global warming will be crossed between 2027-2042

The threshold for dangerous global warming will likely be crossed between 2027 and 2042 - a much narrower window than the Intergovernmental Panel on Climate Change's estimate of between now and 2052.

A company to test electric passenger plane within a year

It'll only have nine seats. But the low cost carrier expects larger electric planes in service by 2027.

191 Countries Strike Deal to Cut Aircraft Emissions

The deal encourages airlines to buy credits through global carbon markets to offset their emissions.