2007-03-20 03:15:06 · 4 answers · asked by doctor g 2 in Environment
First - there are some naturally occuring compounds in soil such as Arsenic, Barium, Lead, and other metals.
So, some soil pollution is caused by the earth itself. Regardless of how it gets there, it can still be in toxic concentrations to humans.
Other chemicals are introduced to soils by spills, leaks or other actions.
http://www.epa.gov/oswer/cleanup/index.html
2007-03-20 04:07:46 · answer #1 · answered by Christmas Light Guy 7 · 0⤊ 0⤋
toxics seeping into the soil causing the soil to to become unheathy and toxic
2007-03-20 10:21:38 · answer #2 · answered by cody1kaos 1 · 0⤊ 0⤋
By humans dumping their toxic wastes and junked "stuff" onto the land, either in dumps or by the side of the road.
2007-03-20 10:23:38 · answer #3 · answered by St N 7 · 0⤊ 0⤋
well by pesticides and by humans spitting, urinating and deficiating in the open
2007-03-20 10:27:12 · answer #4 · answered by Ana C 3 · 0⤊ 0⤋