Today's atmosphere is full of nitrogen and oxygen. these are
a. trace gases
b. variable gases
c. primary gases
d. secondary gases

Write a short paragraph of about 150-300 words. explain how the physical environment can limit human activities.

What is the name of the ocean current that affects the british isles? how does it influence their climate?

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