User: What causes global warming?
Assistant: Global warming is caused by the release of greenhouses gases into the atmosphere. Greenhouse gases in the atmosphere trap the heat from the sun and lead to an overall increase in temperature on the planet. Greenhouse gases are mostly produced by burning fossil fuels like coal, oil, and natural gas. Deforestation is also a contributing factor to global warming since trees capture carbon from the atmosphere when growing, so cutting them down or burning them both releases carbon they’ve been storing, as well as removes their ability to clean the air.