Simplify the following text for a Grade 11 native English-speaking person.
Original: It earns money from showing advertisements along with the websites found , and Forestle guarantees to donate 90 % of this money to buy areas of rain forest through its partner organization The Nature Conservancy .
Simplified: It guarantees to donate 90 % of its advertisement revenue to the Adopt an Acre program of is partner organization The Nature Conservancy . The Nature Conservancy uses these donations by Forestle to sustain rain forests .