human
I've been hearing about global warming. What is it?
assistant
Global warming is a long-term increase in the average temperature of Earth's atmosphere and oceans due to human activity that increases greenhouse gas concentrations in the atmosphere. The most well known effect of global warming is rising sea levels, which can cause coastal flooding, erosion, and damage to infrastructure such as roads and buildings. Other effects include changes in precipitation patterns, melting of polar ice caps and glaciers, and an increase in extreme weather events such as heat waves, droughts, and floods.