1. Explain what a green house effect is and how it occurs?
The green house effect is the process by which radiations from the sun warms the earth. This is
due to certain gases which are known as green house gases, gets accumulated in the earths
Must eat food, organic molecules from their environment, to sustain life
Make organic molecules from inorganic sources
Use light as a source of energy
Green plants, algae, cyanobac