Question

The near extinction of many bird species was caused by:

acid rain
use of DDT
carbon dioxide pollution
thermal pollution

Answer 1

i actually have no idea xD could be any of these. I think this is just a historical fact or something?

Answer 2

ok thanks

Answer 3

Maybe this will help:
http://ridge.icu.ac.jp/biobk/BioBookcycles.html
http://www.stanford.edu/group/stanfordbirds/text/essays/DDT_and_Birds.html
http://faculty.plattsburgh.edu/thomas.wolosz/acid_rain.htm

Answer 4

thank u

Answer 5

I think its DDT

Answer 6

thanks

Answer 7

No prob :)