Answer:
1. Greenhouse gases trap heat in the atmosphere warming the Earth’s temperature above freezing. This is known as the Greenhouse effect.
2.. The three greenhouse gases that are of most concern are Carbon Dioxide (CO2), Nitrous Oxide (N2O), and Methane (CH4).
3.Without some greenhouse gases and the Greenhouse Effect, Earth’s temperature would be close to -18°C.
Step-by-step explanation: