human
I've been hearing a lot of news lately about the global warming. What is it all about?
assistant
Global warming is caused by an increase in greenhouse gases in the atmosphere, which traps heat and causes temperatures to rise. The most common greenhouse gases are carbon dioxide (CO2), methane, and nitrous oxide. These gases trap heat and cause the Earth's temperature to rise. This can have serious effects on our environment, including rising sea levels, more extreme weather events, and changes in ecosystems.