For hard-core environmentalists, Christmas is the anti-Earth Day, the time of year when some 30 million trees are sold, propped up in living rooms for a month, then discarded like wrapping paper. But every year, on January 7, Massachusetts-based artist and provocateur Jay Critchley does his part to bring a Christmas tree back to the earth by purging it, complete with ritualistic chants, in Provincetown Harbor at sunset. It’s just one of the ways this out-of-the-box artist uses esoteric locations as his canvas: For more than 30 years, he has transformed nuclear cooling towers, historic outhouses, pre-demolished motels, and even his backyard septic tank into site-specific installations, finding his niche through a fearless, politically incendiary approach to art and activism, which are always one and the same. Critchley addresses topics ranging from AIDS and climate change to jingoism and car pollution by, in part, playing the game of his multinational nemeses: He’s patented several satiric companies to market his “products,” such as Tampon Applicator Creative Klubs International (TACKI) and Old Glory Condom Corp. Most recently, he’s launched a petition against our dear state leader, Gov. Rick Scott, which makes his colorful lecture at Florida Atlantic University a timely one. Critchley will speak about the environmental impact of his art activism at 7 p.m. Tuesday at FAU’s Performing Arts Building, located at 777 Glades Road in Boca Raton. Admission is free. Call 561-297-2661, or visit fau.edu/galleries.