By Kate Hogan
April 16, 2012 09:00 PM

Courtesy Marc by Marc Jacobs

It’s Earth Day … the fashionable way! Just in time for Earth Week — which starts today — Marc Jacobs is releasing chic bio-based sunglasses through his Marc by Marc Jacobs line. The shades, made of a material derived from castor-oil seeds, feature a subtle leaf texture and are packaged in a case made of repurposed leather. Sales of the glasses benefit — and raise awareness for — the Nature Conservancy‘s new “Plant a Seed — Grow Your Tree and Save the Forest” campaign, aimed to help the organization’s “Plant a Billion Trees” initiative and restore the endangered Atlantic Forest in Brazil. That’s a lot of eco-friendliness! Find the shades for $140 at Solstice sunglass boutiques and on