_________________________ involves excessive risk taking and optimism, and herd mentality

Some actions such as burning the American flag take the place of speech and are commonly called

What was the major objective of domestic U.S. air-quality legislation like the 1955 Air Pollution Control Act?

a. Pollution in U.S. cities. b. Reducing greenhouse gases. c. Closing the hole in the ozone layer. d. Regulating the emission of methane.