Volunteers can nurture nature at more than 120 worksites during Earth Day 2011: Lighten Up, a countywide environmental event set for Saturday-Sunday, April 16-17.

Volunteers can nurture nature at more than 120 worksites during Earth Day 2011: Lighten Up, a countywide environmental event set for Saturday-Sunday, April 16-17.

Those interested can sign up to plant trees, pick up litter, scrub graffiti, remove invasive species or develop community gardens.

After the work days, an eco-friendly festival featuring music, art, local business and food will take place Saturday, April 23, at Franklin Park Conservatory. Volunteers will receive perks that include a free scoop of Jeni's Splendid Ice Creams or a beer from Columbus Brewing Company.

To register, visit lightenup2011.org.