He was the Brazilian Green Party's presidential candidate in the 1998 election.
In 2010, he was elected to the Brazilian national parliament (2011–2014) but decided not to run for reelection in 2014.
He is currently the executive director of the Brazilian Climate Center think tank.
He was the Coordinator of the Brazilian Forum for Climate Change from October 2016 to May 2019.
working with government, business, and civil society stakeholders in the implementation of the Brazilian National Determined Commitment.
He was a member of the Brazilian delegations to the UNFCCC Conferences of Berlin, Montreal, Bali, Copenhagen, Durban, Warsaw, Lima, Paris, Marrakech, Bonn and Katowice.
He is one of the promoters of the concept of carbon "positive pricing" and of the recognition of the "social and economic value of mitigation actions" enshrined in Paragraph 108 of the Paris Decision.