Richie Havens was one of the first performers I saw play live back in my pre-teen years when my father took me to see him at the Hudson Valley’s legendary Opus 40. Most famous for stepping in to open up the Woodstock concert, the Brooklyn-born Havens died yesterday of a heart attack at the far too-young age of 72.

Beyond his Woodstock status—he’d originally been scheduled to play fifth but was bumped up because of other acts’ travel delays—and a long, successful musical career interpreting songs as well as writing his own, Havens was a determined progressive who took every opportunity to use his music to help improve peoples lives.

A stalwart ally of the environmental movement, Havens devoted considerable energy to educating young people about the critical urgency of environmental activism. In 1975, he founded the Northwind Undersea Institute, an oceanographic children’s museum on City Island in the Bronx. In the early 1980s, he created the Natural Guard, an environmental organization for children. He did too many benefit concerts to count on behalf of environmental, antiwar, civil rights and anti-nuclear causes.

The Do the Math Movie is being screened concurrently at 7:00 pm local time on April 21 at house-parties and screenings across the country. At forty-two minutes, it tells the story of the rising movement trying to change the terrifying math of the climate crisis and fight the fossil fuel industry. Find a screening near you, host one yourself and add your name to The Nation's open letter imploring Secretary of State John Kerry to reject the Keystone XL Pipeline.

If you know someone who doesn't know about the Tar Sands, this is a good video to send their way.

More than ten years ago, David Riker’s acclaimed debut film, La Ciudad (The City)—about the lives of Latin American immigrants in New York City—anticipated many of today’s most contentious debates about undocumented immigrants and their possible pathways to citizenship. For his long-awaited follow-up, The Girl, Riker traveled to the border to tell an unconventional tale about migration.

Australian actress Abbie Cornish stars as a 20-something working-class South Texan who seeks to escape her minimum-wage existence by smuggling immigrants across the border. Emotionally distraught after losing custody of her son, single mother Ashley becomes desperate when she loses her job at a local Austin megastore. So when the risky opportunity to become a coyote arrives, she takes it. When the attempted crossing ends in tragedy, she finds herself stranded with a young girl who lost her mother during the journey. Harrowing, grim, but ultimately hopeful, The Girl turns the central myth of the border—that hope flows north—upside down.

The film opens tomorrow, March 8, in two New York City theaters and is currently scheduled to run in theaters in Tucson, Phoenix, Los Angeles, San Diego, Dallas, Houston, San Antonio over the course of March. Click here for a full theatrical schedule and contact your local cinema and implore them to run the film too.