What are Igneous Rocks.
Here are a couple of sites that may help.
http://www.google.com/search?hl=en&ie=ISO-8859-1&q=igneous+rocks&btnG=Google+Search
http://volcano.und.edu/vwdocs/vwlessons/lessons/Slideshow/Igrocks/Igindex.html
tell about how humans have an effect on plants and why people need to take care of plant habitats
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