EcoWatch: Courtrooms usually arent jovial places, but with 21 youth plaintiffs and two busloads of supporting junior high-school students in tow, the air in the U.S. District Courthouse here on Wednesday felt more field trip than federal court. The occasion for the youthful energy was a hearing on a complaint filed on behalf of the plaintiffs, aged 8 19, by Oregon nonprofit Our Childrens Trust. The kids lawyers assert that their clients and the younger generation as a whole, have been deprived of key...