Réponse :

In the past 100 years carbon dioxide levels have increased a lot.

In the last 100 years the sea level has risen by 6.7 inches.

Since the 1980s hurricanes have grown stronger.

Since 1880 the surface of the world's oceans has become warmer.

In the last 30 years the Arctic sea ice extent has decreased by 10 percent.

In the past 10 years some butterflies and foxes have moved further North.

Explications :