Kitchen and bath product manufacturers continue to move forward in their efforts to go green. From toilets that require less than a gallon of water per flush, to vent fans that meet new green building standards, plenty of eco-friendly products are available for your next green remodel. Lauren Hunter is associate editor of Remodeling. Vicky Markovitz is associate editor of Custom Home and Building Products. Nigel Maynard is senior editor of Builder and resdiential architect.