Climate Counsel, through the Ecocide Law Advisory, helped draft and advocate for the Ecocide Bill now before Brazil's Congress — legislation designed to protect the Amazon and other threatened biomes by holding senior decision-makers criminally responsible for the most severe environmental harm.

Working closely with the political party PSOL and Ecoe Brasil, Ecocide Law Advisory contributed in-depth research and direct input into the bill's language, drawing on its experience advising lawmakers on ecocide laws in the EU and beyond. Paolo Busse and Richard J. Rogers were instrumental in shaping and advocating for the bill. Climate Counsel was also part of the coalition supporting it, alongside Ecoe Brasil, Observatório do Clima and Stop Ecocide International. Bill No. 2933/2023 would insert ecocide into Brazil's Environmental Crimes Law, drawing on the international definition of ecocide and targeting those whose decisions knowingly cause severe, widespread or long-term harm, with penalties of roughly 5 to 15 years' imprisonment. It is explicitly framed to strengthen protection of the Amazon and of the Indigenous and traditional peoples who depend on it.

On 8 November 2023, the Environment and Sustainable Development Committee of the Chamber of Deputies approved the text of the bill — a crucial first step — and it continues its passage through Congress.