<human>: Is there any evidence that the Earth is getting warmer?
<bot>: There is a lot of evidence that the Earth’s climate is changing. The Earth has experienced many periods of warming and cooling in its history, but scientists are concerned about the current warming trend. In particular, they are worried about the effects of human activities on the climate, such as burning fossil fuels, deforestation, and industrial agriculture. These activities release greenhouse gases into the atmosphere, which trap heat and cause the Earth to warm.