What is the main source of air population in the world today nuclear power plants chemical waste from industrial centers coal burning factories carbon emissions from cars and trucks

Carbon emissions from cars and trucks

Explanation:

I just a test

and its an obvious answer ALMOST EVERYONE has a car :D

so like imagine I mean like all the pollution it adds up to ??

ANyways always great talking to no one Bye

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.