Question

what is greenhouse effect.
how does it affect global warming​

Answer 1

The greenhouse effect is the way in which heat is trapped close to the surface of the Earth by “greenhouse gases.” These heat-trapping gases can be thought of as a blanket wrapped around the Earth, which keeps it toastier than it would be without them.

Global warming stresses ecosystems through temperature rises, water shortages, increased fire threats, drought, weed and pest invasions, intense storm damage and salt invasion, just to name a few. Some of Australia's great natural icons, such as the Great Barrier Reef, are already threatened.

Answer 2

The capturing of the radiation of the sun by certain gases called greenhouse gases such as CO2 which warms the earth is called greenhouse effect
Excess accumulation of greenhouse gases can alter the average temperature of the earth.
This is known as global warming