Please select the word from the list that best fits the definition
Which of the following best explains why air pollution that was once blamed for global cooling is now considered responsible for global warming?a.Pollution began reflecting sunlight and heat rather than absorbing it.b.Evidence of global warming became overwhelming.c.Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.d.Congress required scientists to assign a cause to global climate change.
Which of the following best explains why humans need constant supplies of fresh water?a.Humans need a constant supply of water to provide them with essential vitamins.b.Humans need a constant supply of water to maintain proper hygiene.c.Constant supplies of freshwater are needed because body water is continually being lost.d.Constant supplies of freshwater are not actually necessary for survival.
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