2008 was International Year of the Reefs (which was supported in Singapore) and International Year of the Potato and International Year of the Frog.
What is featured for 2009?
As far as I could find out, 2009 is International Year of Astronomy. 2009 is also International Year of Natural Fibres. Both were proclaimed in the UN General Assembly.
We'll have to wait a while before we get to anything vaguely ecological. In 2011, it will be International Year of the Forests according to the Wikipedia page on International Observances.
