KIEV, May 30 - Ukraine??™s largest coalmine, Zasyadko, on Tuesday put in operation the first power unit at co-generation plant that will burn methane, a potent greenhouse gas, or GHG, to produce power and heat.

Ukrainian President Viktor Yushchenko, who participated in the plant opening ceremony in the Donetsk region, praised the project for its energy efficiency and said ???tens other coalmines will follow the same path.???