Want this question answered?
It important to know what a primary and secondary source is because it helps us destinguish a source that happended during the event and a source that the auther wrote from other sourceses that he/she read.
In a textbook, the internet, or in A history book in the library
Historians will help us.
Hydroelectric power
No
Primary source because a primary source is from the past/something from someone whose been in that time but a secondary source is something from us/people who have not been in that time, and its also what we think happened then.
How about you do your AP US History or US History homework, and find the answers in your textbook, rather than asking random strangers on WikiAnswers? Thank you. :)
The primary source of acid rain is sulphur oxides e.g H2SO4,SO2,SO3 respectively
USAPA
A primary source is a source from someone who was there. A diary, or letters from a soldier, for example, help us understand the war from his specific point of view.
Coal is very important to the US. It is the primary source of energy for the country.
The Congressional Record is the primary source for obtaining information on a specific bill. It is published the US Government Printing Office.