Asked by jack

examples of how humans have increased their food supply and what effects these methods have on the environment overall.
Answered by Ms. Sue
Extensive irrigation >> depletes water table

Fertilizer >> run off pollutes streams

Bioengineered plants >>
http://www.npr.org/templates/story/story.php?storyId=114206060


Answered by bobpursley
you might investigate the effects of fish farming on water downstream, also.