The green house is a natural process where certain gases in the Earth's atmosphere trap heat from the sun, keeping the planet warm enough to support life. These gases, such as water vapor, carbon dioxide (\(CO_{2}\)), and methane, act like a blanket, allowing sunlight to pass through but absorbing and re-emitting infrared radiation (heat) that would otherwise escape into space. While the natural effect is crucial for life, human activities like burning fossil fuels and deforestation have increased the concentration of these gases, enhancing the effect and causing global warming.   How the greenhouse effect works Sunlight enters: Energy from the sun, primarily as visible light, passes through the atmosphere and warms the Earth's surface.  Heat is released: The warmed Earth's surface radiates energy back into the atmosphere as infrared radiation, or heat.  Gases trap heat: Greenhouse gases in the atmosphere absorb some of this outgoing infrared radiation.  Earth is warmed: These gases re-emit the heat in all directions, including back toward the Earth's surface, which keeps the planet at a habitable temperature.  Natural balance: A balance of these gases is necessary for maintaining a comfortable temperature; without them, the Earth's average temperature would be about \(-20\degree C\) (\(-4\degree F\)).