Assertion :Presence of green plant is essential for greenhouse effect. Reason: Chlorophyll of green plants cause greenhouse effect.
A greenhouse traps the sun's rays and keeps the heat from escaping. It is warm inside. Certain gases in the atmosphere such as carbon dioxide, methane and water vapour trap energy from the sun. The natural greenhouse gases act like a big blanket around the earth, keeping it warm.
The presence of green plants reduces global warming hence reduce the greenhouse effect. Also, chlorophyll of green plants reduces the greenhouse effect and it does not cause the greenhouse effect.
Hence option D is correct.