<human>:  What are the causes of global warming?
<bot>: One of the main causes of global warming is the increase in greenhouse gas emissions, primarily from burning fossil fuels such as coal, oil, and natural gas. Other contributors to global warming include deforestation, overgrazing and the increasing use of fertilizers and agrochemicals, as well as aircraft and motor vehicle emissions. Additionally, changes in land use, such as the conversion of natural habitats to agricultural fields, also contribute to the release of greenhouse gases.