Ostap Mykhaylovych Semerak (Ukrainian: ????? ?????????? ???????) is a Ukrainian politician and former People's Deputy of Ukraine's parliament, the Verkhovna Rada, and former Minister of Ecology in the Groysman Government.Semerak is currently a member of the People's Front. Minister of the Cabinet of Ministers of Ukraine in Yatsenyuk Government from 27 February 2014 till 2 December 2014.