Navy Pier is always an exciting place, but for one weekend in October it’ll be the site of the Chicago Green Festival, the nation’s largest and most dynamic sustainability event.  You’ll have the chance to hear from leaders in living green — from food, fashion and health to energy, construction and design. There’s also an organic beer and wine garden featuring exclusive performances from local DJs, as well as classes, cooking demos, art installations, and a unique marketplace featuring the latest and greatest in sustainable products and services from more than 250 businesses. Bring the kids too, and they can learn a thing or two in special areas geared for youngsters. There’s so much to see and do that you might want to make an entire weekend of it — and a weekend pass is available for purchase.