Global warming is the long-term heating of the Earth's surface that is seen as a result of human activity, particularly the burning of fossil fuels, which raises the levels of heat-trapping greenhouse gases in the atmosphere.
This phrase should not be used in place of "climate change."
Carbon dioxide, methane, ozone, water vapor, nitrous oxide, and CFCs are the main gases that cause this impact.
The most important greenhouse gas released by human activity is carbon dioxide (CO2).
The greenhouse effect is a phenomenon that happens when heat from a planet's host star passes through its atmosphere and heats the planet's surface but is prevented from radiating back into space by the atmosphere, making the planet warmer.