How might conditions on earth be different without the greenhouse effect?

Since the greenhouse effect causes the earth to be warmer than it would be without the atmosphere, the earth would be cooler and the temperature would be nearly 0 degrees fahrenheit instead of the average 59-60 degrees fahrenheit 

Competition. interaction among organisms that compete for the same natural resource (food, shelter, water, space) in an ecosystem. predation. an interaction in which one organism kills another for food. predator. prey. symbiosis. mutualisum. commensalisum. parasitisum.

hope this !

Ihaven't done that yet, so no idea,but this is not the right place to ask