Maria Osmarina da Silva Vaz de Lima is a Brazilian politician and environmentalist. She is currently the spokeswoman for the Sustainability Party. 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.
Born in a rubber plantation in Acre, Marina moved to the state capital Rio Branco as a teenager, where she became literate. After graduating high school, she completed her undergraduate degree in History from the Federal University of Acre at 26. She developed an interest in politics and joined the Revolutionary Communist Party, a Marxist organization that was housed in the Workers' Party, later helping to found the Unified Workers' Central of Acre. She helped Chico Mendes to lead the trade union movement, being elected as councillor of Rio Branco in 1988 for her first mandate in a public office.
Silva was a member of the PT until 2009, and served as a Senator before becoming Minister of the Environment in 2003.