[plantabillion.org. April 24, 2015 is Arbor Day. Plant a tree and/or join the Arbor Day Foundation. For a membership fee of $10, they will plant ten trees in an endangered forest in your honor.] * * AWESOME.
Beautiful digital art you could display in your classroom to facilitate discussion about global warming. You could present one of images and ask the students what they think it's trying to convey, no text is needed to spark discussion. Great way to get students interested and engaged in the topic.
Acidic Ocean Experiment "Acid oceans are caused by increased amounts of carbon dioxide absorbed by oceans, putting many marine animals in danger." - Adventures of Ed the Bear This experiment demonstrates what would happen if acidity got further out of hand due to fossil fuels and global warming