5. The greenhouse effect, deforestation, and acid precipitation are a few problems confronting people in the twenty-first century. These problems indicate which of the
following is needed in human societies?
a. The development of auto industries in developing nations
b. A reduction in reforesting efforts in certain regions
c. Cooperation between nations to reduce pollution.
d. An increase in the worldwide production of oil

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u