The approach which allows the decisions of various eras to result in a long-lasting impact on the present scenario is the historical research approach.
<h3>What is meant by research?</h3>
Research is the process to find out information and knowledge about any topic or concept from every possible source.
Historical research is a qualitative approach that focuses on identifying the events that happened in ancient times and interpreting the facts and reasons for their occurrence. This study helps in analyzing the impacts of past events on the current scenario.
Therefore, the historical research approach is the one that allows us to study the impacts of different eras on the present lives.
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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.
You didn't list options, so I'll simply give some history here.
When President Ronald Reagan came into office in 1981, he took a hard stance toward the Soviet Union. Where previous leaders of the nations had pursued detente and nuclear arms reduction, Reagan spoke of the Soviet Union as the "evil empire" and, in 1983, proposed a major new space-based missile defense program, the Strategic Defense initiative.
But in 1985, the positions of the two countries began to shift again. In March 1985, Mikhail Gorbachev proposed policies of perestroika (restructuring) and glasnost (openness) in the Soviet Union. In November 1985, Reagan and Gorbachev met in person for the first of several summit meetings they would have, and developed a personal relationship.
In 1987, Reagan gave a speech in Berlin (a city divided between democratic West Berlin and communist East Berlin). In that speech he issued a famous personal appeal to Gorbachev, saying:
- <em>We welcome change and openness; for we believe that freedom and security go together, that the advance of human liberty can only strengthen the cause of world peace. There is one sign the Soviets can make that would be unmistakable, that would advance dramatically the cause of freedom and peace. General Secretary Gorbachev, if you seek peace, if you seek prosperity for the Soviet Union and Eastern Europe, if you seek liberalization, come here to this gate. Mr. Gorbachev, open this gate. Mr. Gorbachev, tear down this wall!</em>
Officially recognized as the one of the seven wonders of the
modern world by the American Society of Civil Engineers, the Panama Canal was
and still is one of the biggest and hardest engineering feats ever
accomplished. It greatly reduced the
time necessary to get from the Atlantic to Pacific Ocean but unfortunately it
also led to the resentment of various Latin countries including Columbia towards
the US because of the role US played in the conflict between Panama and Columbia.
