It's both! Scientists really can't agree on it.
Megaloblastic anemia is characterized by red blood cells that are larger than normal.
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Megaloblastic anemia is a type of anemia in which the number of erythrocytes (red blood cells) is lower than normal and their size is higher than normal. Because of their size, erythrocytes may not be able to exit the bone marrow and to enter the bloodstream and deliver O2.</span>
<span>air = a mixture of nitrogen, oxygen and some other bits
(pure) CO = carbon monoxide, a compound
pure water = H2O, a compound.</span>
No, because the wind could blow and it could spread all over the area, plus it could get into the water and spread in the ocean. Many factors could cause the pollution to move across different areas.
