How about commorating Vladimir Lenin's birth on one side-April 22, 1870. And the founding of Earth Day on the other side: April 22, 1970.
Yes, I saw that piece "from" Somalia, and the coin(s) from Turkey mentioned here meet the OP's criteria too, I think. It's just that, if every coin related to environment protection counted, the topic would get very long even without all the political comments. Christian