Environment News Service: Grassroots climate activists took over the Washington, DC office of the nonprofit group Environmental Defense Monday. Led by Dr. Rachel Smolker, daughter of one of the group’s founders, the late Robert Smolker, the 20 activists were protesting Environmental Defense’s support of carbon trading as a solution to global warming. Some of the demonstrators rearranged furniture in the office, to dramatize how marketing carbon is “like rearranging the deck chairs on the …