Antonio Oposa Jr. is a creative litigator, organizer and activist for environmental legislation in the Philippines. Oposa helped to litigate one of the first class-action suits taken by children to oppose environmentally-harmful actions taken by their government: in the 1990s, he represented 43 children from a local village to stop deforestation around the village that had been authorized by the Philippine government, on the basis that the children’s rights would be harmed by the deforestation. Though the case was initially thrown out in lower courts on the basis that the children did not have legal standing, the Philippine Supreme Court overturned these, affirming the children did have standing; between both legal and legislative action, the deforestation activity was halted. The case inspired several other environmental cases around the globe, with children severing as the plaintiffs to fight for these rights.
In 2013 Oposa sued seven individual and government officials for violating Philippines environment laws though noise pollution from sound amplifier during regular benefit dance events.