HUman IMPACT on the earth!
human impact
atmosphere
lithosphere
biosphere
hydrosphere
workcited
workcited
http://pendleton.cmswiki.wikispaces.net/file/view/The+Structure+of+the+Hydrosphere-ppt.pdf
http://www.meritnation.com/ask-answer/question/explain-the-water-cycle-in-accordance-with-the-ncert-textboo/natural-resources/1892263
http://www.thedenverchannel.com/news/aerial-photos-from-collbran-mudslide
http://www.thesun.co.uk/sol/homepage/news/money/4102936/UK-factories-soar-to-10-month-high.html