Check out Code of Federal Regulations/49/chapter 1/Part 172.
During the 1940s, the historical era in which you would most likely find an <span>abandonment of laissez faire economic policies in the United states. Hope this answers your question.</span>
I believe the answer would be C, burning fossil fuels. Oil and gas is made up of the remains of microscopic plankton. Over millions of years the remains become the carbon-rich coal, oil and gas we can use as fuel. When fossil fuels are burned they release carbon dioxide into the atmosphere, thus contributes to global warming.
