On April 13, 2021, six young climate activists filed suit alleging that the government of Brazil, by using a carbon trick maneuver in its updated Nationally Determined Contribution (NDC) to the Paris Agreement, violated obligations under the Paris Agreement and Brazilian law. Brazil submitted an updated NDC in 2020 that maintains a 43 percent emissions cut by 2030 goal, but raises Brazil's estimated baseline emissions from 2005. In effect, plaintiffs allege, this would allow Brazil to emit 400 million more tonnes by 2030. Plaintiffs allege that this accounting maneuver violates the Paris Agreement's obligation to increase ambition in updated NDCs, violates Brazil's obligation to safeguard the right to an ecologically balanced environment under Article 225 of the constitution, and violates Brazil's National Policy on Climate Change.