Trees for the future is a great charity that I have supported for years. They plant trees that are also edible to help reforest deforested areas and fight hunger as well. http://plant-trees.org/ You can also plant trees in another person or group's name or in memorial of someone. When you plant trees in someone else's name they send them a certificate that tells them about it and makes a great gift. It really is a wonderful charity and I recommend checking them out.