Michael Pollan, author of In Defense of Food: An Eaterâ??s Manifesto, is scheduled to speak Sept. 24 at 7 p.m. at the Kohl Center in Madison, Wis., as part of the University of Wisconsin-Madisonâ??s new common book program known as Go Big Read.Local farmers are reacting to Pollanâ??s scheduled appearances by organizing a show of solidarity and have invited all farmers, students, agriculture professionals and â??people who are thankful for our safe abundant food supplyâ? to attend the event and wear the color green.