Give back while getting smarter

I am addicted to these sites! And it makes me feel good too ;)
check it out:

freerice.com for every answer you get right, 20 grains of rice is donated through the UN word hunger program.

and also this one

freepoverty.com For each correct answer, 10 cups of water is donated. You have to locate the place they give you. I really suck at geography!