The greenhouse effect is caused due to ozone layer depletion.

• The greenhouse effect is a warming of Earth's surface and the air above it. It is caused by gases(greenhouse gases) in the air that traps energy from the sun. Without the greenhouse effect, Earth would be too cold for life to exist.
• Ozone layer depletion allows harmful UV rays to enter the Earth's atmosphere. Exposure to UV rays can result in sunburns, skin cancers, genetic disorders etc in humans and reduced productivity in both forests and sea