What do greenhouse gases do with the heat released from earth in the form of infra-red radiation?

Greenhouse gases absorb and retain the heat rising from the earth. As greenhouse gases are increasing, so is the temperature of the earth. This is causing global warming and climate change.

This heat is released during the cooler periods of the day which, in turn allow life to exist on the planet. The heat is not indefinitely retained, but part of the natural process.