The Chicago Center for Green Technology is kicking off a new season of free seminars, through its Green Tech U, next month. Some specifically target architects and engineers (who can earn certificates and continuing education credits), but others are ideal for those of us who wonder what we can individually do to make a difference for the environment: convince the condo board to install a green roof? Put a rain barrel in the yard? Call up the governor and ask him to impose tougher auto emissions standards? Some seminars are listed in Slowdown; click here for the complete catalog.