A group cleans up the San Jose's Guadalupe River

Group holds Earth Day clean-up at San Jose's Guadalupe River. Len Ramirez reports on grassroots volunteers the Trash Punx working to clean up the South Bay. The group is based in San Jose, California, and the city of San Jose. The trash Punx is a group of grassroots volunteers who clean up South Bay's waterways.

Colorado volunteers clean up South Platte River ahead of Earth Day. Volunteers clean up the river ahead of the holiday. Earth Day is April 1. Volunteers help clean up Colorado's South Platter River in preparation for the event. Watch CNN.com/Heroes for more on Earth Day 2015.