In 1998, DiCaprio established his own foundation to protect the world's last wild places and to ensure a harmonious balance between humans and the natural world. The foundation supports projects that focus on biodiversity conservation, climate change, and ocean protection. It has funded over 200 projects across six continents, making a tangible difference in environmental preservation.

DiCaprio has been a vocal advocate for renewable energy sources as a solution to combat climate change. He has emphasized the need to transition from fossil fuels to sustainable alternatives like solar and wind power. His support for renewable energy initiatives has helped raise awareness about their importance in reducing carbon emissions and creating a more sustainable future.

DiCaprio has also made appearances at several global climate conferences, including the United Nations Climate Change Conference. He uses these platforms to highlight the urgency of climate action and the need for global cooperation. His speeches often stress the importance of reducing greenhouse gas emissions and investing in sustainable development.

DiCaprio has also used his platform to document environmental issues through films like Before the Flood and Cowspiracy. These documentaries highlight the impact of human activities on ecosystems and encourage viewers to take action. By reaching a wide audience through film, DiCaprio raises awareness about critical environmental challenges.

DiCaprio is also a staunch supporter of indigenous rights, recognizing that indigenous communities are key to protecting ecosystems. He has collaborated with indigenous groups to highlight their role in conservation efforts. By amplifying their voices, DiCaprio raises awareness about the importance of respecting indigenous knowledge and practices in environmental protection.