Complete the text about global warming.

The biggest environmental problem we face today is global warming. It happens because of the increase in greenhouse gases in the atmosphere. These gases trap heat from the sun, causing the Earth's temperature to rise. As a result, we are experiencing more extreme weather events, such as hurricanes, floods, and droughts. To combat global warming, we need to reduce our carbon footprint by using renewable energy sources, planting trees, and conserving energy.