How many degrees cooler would earth be without the greenhouse effect?

Why the moon is not visible from earth during the new moon ?

This map shows the member states of the european union (eu). based on this map, what is the most likely reason the eu was formed? a) to increase trade between european nations b) to protect themselves from foreign enemies c) to begin the process of forming one large nation d) to isolate europe from the rest of the international community j

Which season occurs in the northern hemisphere when the sun is at its lowest point in the sky