Video Summary

**Causes** There are many different causes of climate change, including human activities such as the burning of fossil fuels, deforestation, and agriculture. Greenhouse gases trap heat in the atmosphere, causing the planet to warm. The average global temperature has increased by about 1 degree Celsius (1.8 degrees Fahrenheit) since the late 19th century, and is projected to increase by another 2-4 degrees Celsius (3.6-7.2 degrees Fahrenheit) by the end of the 21st century. The effects of climate change are already being felt around the world, in the form of more extreme weather events, rising sea levels, and changes in plant and animal life. Climate change is a serious threat to human health and well-being, and it is important to take action to reduce greenhouse gas emissions and mitigate the effects of climate change.