Climate Change causes
The earth system is a self-balanced system. However, climate changes all the time. We can divide climate change factors into two categories: natural factors and human factors.
a)external changes(from extraterrestrial systems):
1)Changes in Solar Output
2)Changes in the Earth's Orbit
b)internal changes(from ocean, atmosphere and land systems)
1)changes in the concentrations of atmospheric gases
2)natural activities on the earth:mountain building, continental drift, atmosphere/ocean heat exchange
1)Enhancing the Greenhouse Effect
-increase CO2 emissions through fossil fuel combustion, and so on.
2)Land Use Change