Lots of places are taking the 40th anniversary of Earth Day pretty damn serious this year. Consider Bread & Brew off Dupont Circle. The restaurant is going 100 percent vegan today, no doubt an acknowledgment of the role meat production plays in global warming (though not as much as originally thought).

In a similar vein, the new eco-friendly chain, Mixt Greens, which came out of the gate fast in D.C., is offering free tote bags to the first 150 customers who visit one of its three local shops. The bags will include packets of herb seeds and recipes from chef/co-founder Andrew Swallow‘s new cookbook, Mixt Salads, which hits stores next week.

There’s even an event today at the Phillips Collection in which Nora Pouillon, (the founding mother of organic cooking in D.C.), Mark Toigo (the founder of Toigo Orchards), and winemaker Bob Lyons discuss the impact that artist Georgia O’Keeffe had on their careers. FRESHFARM Markets‘ co-director Ann Yonkers will moderate the discussion, which will be followed by some small plates that Pouillon derived from the O’Keeffe-inspired cookbook, A Painter’s Kitchen. (The discussion starts at 6:30; $15 for the public; free for Phillips members.)

Then there’s the Earth Day promotion over at McFadden’s, the Irish pub that views the green movement in a different way. If you wear something green tomorrow at the West End bar, you can drink free from 7 to 8 p.m. A lot of damage can be done in that small window of opportunity.

Oh, yes, the first 100 patrons get Earth Day tote bags at McFadden’s, too. I suspect that won’t be the draw.

For more Earth Day related events, check the Washingtonian‘s calendar, NBC Washington’s roundup, or the list compiled by Dining in D.C.

Just remember: No puking on Mother Earth during Earth Day.