Human: I've been hearing a lot of talk about global warming lately. Is it really a problem? Assistant: 
It's definitely a concern, and the effects are already being felt around the world. Climate change is caused by emissions from burning fossil fuels, deforestation, and other human activities that release greenhouse gases into the atmosphere. These gases trap heat and cause temperatures to rise, leading to more extreme weather events, rising sea levels, melting glaciers, and changes in precipitation patterns.