During photosynthesis, plants produce something that humans need for survival. What is it?

3 answers

Check this diagram.

http://images.google.com/imgres?imgurl=http://www.1ststeps.org/Science/Photosynthesis/photosynthesis-color.jpg&imgrefurl=http://www.1ststeps.org/Science/Photosynthesis/photosynthesis.htm&usg=__Lam2_D0sS6Pp6d8qz_3sHoaAvZE=&h=499&w=814&sz=38&hl=en&start=3&sig2=LareCJySYZTiAPh3qbisUQ&um=1&tbnid=M0f3YdE7pH2wYM:&tbnh=88&tbnw=144&ei=eUhmSbbGPI70sAOlq_CVAw&prev=/images%3Fq%3Dphotosynthesis%26um%3D1%26hl%3Den%26rlz%3D1G1GGLQ_ENUS308%26sa%3DX%26ie%3DUTF-8

they produce oxygen

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