Groupon is offering a fantastic “pay it forward” type of promotion right now. Groupon will give you a $15 credit to your Groupon account when you make a $15 donation to Greenpeace. Sign up for or log into Groupon from this page and you will see the deal. You will get reimbursed your $15 Groupon credit after 4/15.
This Groupon is not tax-deductible, but if you use Groupon a lot or even periodically, this would be a great way to help someone else at no cost to you. And, if you have any Groupon credits already in your account, you can put them towards this purchase!