human
I've been hearing about global warming. What is it?
assistant
Global warming is a long-term increase in the Earth’s average surface temperature caused by human activities that release greenhouse gases, such as burning fossil fuels and deforestation. This warming trend has had many effects on our planet, including rising sea levels, changes to weather patterns, melting ice caps, and more frequent and intense extreme weather events like hurricanes and droughts. Scientists believe that these changes are likely to continue unless we take steps to reduce emissions of greenhouse gases into the atmosphere.