In the 1970s, the U. S. Environmental Protection Agency (EPA) introduced stricter regulations on the exhaust emissions of gas-powered vehicles. In order to comply with these regulations, automobile manufacturers began installing a new invention that effectively decreases the toxic pollutants that are produced by internal combustion engines. This invention, the , has effectively reduced the smog and air pollution in every city in the United States.

explanation:

these are the geographical features of the gupta empire.

1)it inherited the land owned by the mauryan empire.

2)one obvious difference between the two empires is that the gupta empire was smaller that the mauryan.

3)the gupta empire is located in the northern region of the subcontinent underneath the himalayan and hindu kush mountains.

the gupta empire, marked by extensive inventions and discoveries that contributed to hindu culture, in subjects such as science, technology, engineering, art, dialectic, literature, logic, mathematics, astronomy, religion, and philosophy.

this period was also known as the golden age of india

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

it   would try making the   president who would the economy get out of depression picked