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Many scientists are convinced that the growing human population is contributing to
the gradual warming trend that is occurring on planet Earth. According to the
researchers, which human activity is MOST likely to be a contributing factor in
global warming?
of
Select one:
o a. Humans have changed the chemistry of the world's oceans by the use of
phosphates and nitrogen-containing compounds.
o b. Humans have released vast quantities of chemicals that have created
excess ozone in the upper atmosphere.
O c. Humans have created acid rain by releasing sulfuric acids into the air in the
exhaust from factories and power plants.
O d. Humans have added carbon dioxide to the atmosphere by burning fossil