Composting with Cornell Cooperative Extension.  We’ll learn about the movement of nutrients from soil, to plants, to compost, and back into soil. You’ll also learn how you can start your own compost!” 5:30 p.m. at Mabee Farm 1100 Main St, Rotterdam Junction, 12150.

The Secret Lives of Herbs with Cornell Cooperative Extension. They’ll be on site to discuss herbs in the garden, answer gardening questions, and do free soil testing. 5 p.m. at Mabee Farm 1100 Main St, Rotterdam Junction, 12150.

“With and For Nature” These artists find inspiration in the wild lands of Upstate New York. 4 to 8 p.m. at Mabee Farm 1100 Main St, Rotterdam Junction, 12150.

Earth Night. An evening celebration of sustainability and living in harmony with the planet.4 to 8 p.m. at Mabee Farm 1100 Main St, Rotterdam Junction, 12150.

Think Green, Keep It Clean: Happy Earth Day! Community Caregiver's Lunchtime Chat. at 1 p.m. via free conference call at 518-992-6661.

Earth Day March. The Schenectady March for Climate. 12 p.m. at Schenectady City Hall 105 Jay St, Schenectady, 12305

Celebrate Earth Day in the Albany Pine Bush. The public is invited to volunteer on a variety of conservation projects in the Pine Bush. Reservation is required at  www.albanypinebush.org/events or calls 518-456-0655. 9 a.m. to 12 p.m. at Albany Pine Bush Preserve Commission 195 New Karner Road, Suite 1 Albany, 12205

Choose Your Own Path: Interactive Mystery Story. Community Caregiver's Lunchtime Chat. at 1 p.m. via free conference call at 518-992-6661.

iMapInvasives Hike. Want to help the environment but don't know where to start? Help researchers track the spread of harmful invasive species using the iMapInvasives app! Call 518-872-0800 to register. 1 p.m. at 87 Nature Center Way, Voorheesville 12186

Paint and Snack. Auxiliary; paint on an 11x14 canvas; silent auction; raffle; appetizers and desserts will be served! $35 per person, to be hosted by the OVFC . 6 p.m. at OFVC Clarksville Fire House, 2178 Tarrytown Rd., Clarksville, 12041.