The answer to this question is the ARCH and CONCRETE. Arch is
a curve structure that was used by the Ancient Romans. Arches have different
forms that produce vaults and arcades. While concrete is a composite material
that is formed by mixing of cement and by sand, gravel, or stones.
Answer:
The correct answer is: In <u>1990</u>, Congress dramatically revised and expanded the Clean Air Act, providing EPA even broader authority to implement and enforce regulations reducing air pollution emissions. (...)
Explanation:
On November 15, 1990 the Clean Air Act was revised in a major effort to strenghten and help ensure better compliance with the Act. The 1990 Amendments were designed to have better response to 4 threats to the environment: acid rain, toxic air emissions, urban air pollution and stratospheric ozone depletion.
Jefferson Davis Abraham Lincoln Compare And Contrast They both were From Kentucky They both were presidents of a country during the civil war
