Greenhouse gases, such as carbon dioxide (CO2), trap heat from the Sun. This causes the Earth's climate to grow warmer, resulting in "global warming".
No they are not the opposite, they are the end products for photosynthesis.
Extracellular fluid<span>-the fluid outside the body's cells
-either in the bodies tissues or as plasma (liquid portion of blood)</span>
I not really sure what the answer is