14 of Mark Ruffalo's Best Movies Through the Years

For the last 20 years, Mark Ruffalo has been an avid activist working to promote clean energy and fight climate change. He also has a nonprofit called The Solutions Project to help in this effort. The 2019 film "Dark Waters" follows Rob Bilott, played by Ruffalo, a defense attorney who takes on a lawsuit against the chemical company DuPont. This environmental case, which is based on a true story, exposed the long history of pollution caused by DuPont.