<human>:  I'm interested in learning more about climate change. Can you tell me what are the most significant causes of it?
<bot>: The most significant causes of climate change are human activities such as burning fossil fuels like coal, oil, and gas; cutting down forests; and farming livestock. These activities release heat-trapping gases, such as carbon dioxide, into the atmosphere, which then build up and cause the average temperature on Earth to increase. Other causes of climate change include natural events, such as volcanic eruptions, and changes in the amount of energy Earth receives from the Sun.