Maria Osmarina da Silva Vaz de Lima (born 8 February 1958) is a Brazilian politician and environmentalist. She's the founder and former spokeswoman for the Sustainability Network Party (REDE). During her political career, Silva served as a senator of the state of Acre between 1995 and 2011 and Minister of the Environment from 2003 to 2008. She ran for president in 2010, 2014 and 2018.