Describe some environmental legislation put into place in the 1970s

I’m annoyed but glad that my history teacher left and quit her job as a teacher to become a flight attendant

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

What was gained through the gadsden purchase