Question

Has the climate already begun to change and how do we know

Answer 1

The climate change has already occurred, you can tell because the air is warmer in some places. Climate change is also noticed in natural disasters, earthquakes happen and hurricanes are stronger.

Answer 2

Climate change is occurring as we speak. As a matter of fact, the ten warmest years on record all occurred within the past two to three decades. Not only that, but other signs of climate change are appearing everywhere. Shrinking glaciers, more enlarged species, and increasingly violent storms may all be signs of global warming and the change in the climate.