Any two natural processes that cause climate change are as follows:

1. Change in solar radiation: Almost all of the energy that affects the climate on the earth originates from the Sun. The energy output is not constant. It varies over time and this has an impact in our climate.
2. Drastic weather changes: Climate change can also occur through drastic weather changes. Disasters like hurricanes or flood can cause the significant damage to the surrounding environment, which, in turn, can affect the climate.