Leo's Promotion

Our friend Leo likes numbers so much, he thought he could study them a little more intensively. So he did and after 4 years and in about two weeks time he will be able to defend his thesis at the Eindhoven University of Technology/Netherlands.
This is a reason to celebrate, a moment he will never forget.
And also unforgettable should be the present that he will receive. Our outdoor loving friend will soon own a little patch of a rain forest. And you shall contribute. NOW.