1800 B.C to A.D 250
Explanation: The earliest Maya settlements date to around 1800 B.C., or the beginning of what is called the Preclassic or Formative Period. The earliest Maya were agricultural, growing crops such as corn (maize), beans, squash and cassava (manioc). During the Middle Preclassic Period, which lasted until about 300 B.C., Maya farmers began to expand their presence both in the highland and lowland regions. The Middle Preclassic Period also saw the rise of the first major Mesoamerican civilization, the Olmecs. Like other Mesamerican peoples, such as the Zapotec, Totonac, Teotihuacán and Aztec, the Maya derived a number of religious and cultural traits–as well as their number system and their famous calendar–from the Olmec.
One of the first environmental legislative acts enacted by a bipartisan Congress signed into regulation by Richard Nixon in 1970 was the Clean Air Act, which mandated government agencies to conduct environmental influence studies for building projects. The decade ended with a dangerous chemical happening at Love Canal, New York.
<h3 /><h3>What is EPA?</h3>
The Environmental Protection Agency stands as an independent executive agency of the United States federal government entrusted with environmental safety matters. President Richard Nixon proposed the structure of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon marked an executive order.
The Environmental Protection Agency (EPA) exists a federal government agency by the Nixon Administration desired at protecting human health and the environment.
When President Richard Nixon started the EPA, it existed assessed to fix acceptable national guidelines and to monitor and implement the guidelines for environmental protection. Thus, the Clean Air Act was enacted early in 1970, but the decade concluded with the Love Canal disaster.
One of the first environmental legislative acts enacted by a bipartisan Congress signed into regulation by Richard Nixon in 1970 was the Clean Air Act, which mandated government agencies to conduct environmental influence studies for building projects. The decade ended with a dangerous chemical happening at Love Canal, New York.
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