Answer:
least imperfect and most republican of the state constitutions
Analyzing and breaking coded messages
electronic surveillance
analyzing data from spy satellites
But I mean your security so it could be multiple things
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.
The answer to your question is,
B. Technology made manufacturing more efficient.
-Mabel <3
The enactment of the Clean Air Act of 1970 (1970 CAA) resulted in a major shift in the federal government's role in air pollution control. This legislation authorized the development of comprehensive federal and state regulations to limit emissions from both stationary (industrial) sources and mobile sources.
