What are the disadvantages of living near the mississippi river?

The large connected urbane area from boston to washington, d.c. is often referred to as

At a continent-continent convergence,

What is the result of the greenhouse effect? a. heat is deflected from the atmosphere. b. heat is released from the atmosphere. c. heat is kept in the atmosphere. d. plants are able to grow in the tropics where the air is the heaviest.