GREEN AND GRATIS: It’s April, which means Earth Day is on its way. To commemorate 40 years of celebrating our home-sweet-home, Worldofgreen.com, the online green-living guide, is giving away eco-conscious goodies from now through April 22. Just log on daily and you could score LeakAlertor leak detectors, EcoUsable stainless steel filtered water bottles, DreamSacks bamboo linens, EcoSak organic cotton bean bag chairs and more. And for the big April 22 Earth Day finale, Worldofgreen.com will gift one lucky winner a NatureMill Indoor Composter, because trash is so 2000-late. GET IT:WorldofGreen.com.