A crash course in changing the world.
It's not a huge amount of money, but site like ripple.org will give money (about $0.01) to charity for every search you do through their version of popular search engines. When you search, they get money from advertisers, which they turn around and donate to charity.
Ripple donates the proceeds of your internet searches to: Oxfam, Oaktree (youth-run development), WaterAid (providing water and sanitation), and the Grameen Foundation (microlending).
You use search engine anyway, why not have your searches do some good?