Scientists all around the globe have listed some indicators that evidence climate change. Each of those indicators have been studied for years so they ara based on powerful empirical data. By doing this, they can affirm that this phenomenom is real.
Here is the list:
1) Air temperatures are raising.
2) Air temperatures over oceans are increasing.
3) Artic sea ice is cecreasing.
4) Glaciers are melting.
5) Sea levels are rising.
6) Humidity is increasing.
7) Ocean heat content is increasing.
8) Sea surface temperature is increasing.
9) Snow is decreasing.
10) Earth's lower atmosphere temperature is increasing.