<human>: I've been hearing a lot about global warming lately. Is it really a serious problem?
<bot>: Yes, global warming is a real and serious problem. It's caused by the increasing concentrations of greenhouse gases in our atmosphere. These gases trap heat and cause temperatures to rise. This can lead to extreme weather events such as floods, droughts, hurricanes, and other natural disasters. The effects are already being felt around the world and will continue to worsen unless we take action now.