Celebrate Earth Day with your fellow students. From 10 a.m. to 3 p.m. more than 30 campus and local environmental organizations will team up at various locations to get petitions signed, register voters, spread information, teach about alternative fuels and generally spread the Earth Day theme. The UA Mall is the center of the action. For more information, contact Alana Levine or Bill Savary at 624-3068, e-mail to recycling@fm.arizona.edu or visit the Web site at http://w3.arizona.edu/~recycle.

Heard of Feldenkrais? If not, do your back a favor and stop by the Arizona Health Sciences building, Room 2823, for some tension-reducing back love. The lessons offer new ways to move with comfort, reduce tension, prevent injuries and improve posture. Casual dress is recommended. Lessons run every Monday at 3 p.m. and 5 p.m. and cost $5 a pop. For more information, contact Bonnie Angelie at 791-0215, e-mail to bclaire@gci-net.com or visit the Web site at http://www.feldenkrais.com.

With all those papers and reports due the last week and a half of school, don' t you think it's time you made sure your commas, periods, semicolons and ampersands are used correctly and logically? Stop by the Modern Languages building, Room 310, at 5 p.m. to hear Dr. Kendra Gaines of the UA Writing Skills Improvement Center discuss "Improving Punctuation." The workshop is free. For more information, contact Donna Rabuck at 621-5849.

Anyone involved with UA is invited to take part in a comprehensive university campus-planning meeting. Now is your chance to make a difference in UA's future. Campus planners will meet at 2 p.m. in the Student Recreation Center to review ideas and proposals for land use and circulation and some of the principles for planning south-campus projects like Highland Commons and the area. A walking tour of the area will be held tomorrow from 1:30 p.m. to 4:30 p.m. For more information, contact Campus and Facilities Planning at 621-1099.

The Africana Studies Department lecture for the week will take a look at "Paradise: Toni Morrison's Version of Rugged Individualism and the American West." Geta Leseur of the University of Missouri, who is also a candidate for associate professor in the Africana Studies department, will be the speaker. Stop by the Psychology building, Room 306, at noon to check it out. For more information, contact the Africana Studies department at 621-5665.