Why would increased levels of greenhouse gases contribute to higher temperatures on earth?

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

Answer this asap. why did the americans go to china? a. trading b. exploration c. land d. live stock

What are the 28 countries in the eu?