==== Photosynthesis ====

water & carbon dioxide -> -> carbohydrates & oxygen

=== reading ===
"This Cribsheet covers the basics of photosynthesis: where it happens, how light is used in the process, and why we think photosynthesis may have triggered the rise of complex life." >> http://www.seedmagazine.com/news/2007/05/cribsheet_10_photosynthesis.php