From the New Yorker profile of THK: "What was once one of America’s most polluted cities is now, according to Heinz Kerry, one of its cleanest, in part because of her environmental leadership. Like the new convention center several blocks away, for which she sponsored a design contest, the offices are so scrupulously 'green' that one can, in theory, eat the carpets." Just in case you disagree, be warned that she feels that she has "paid my dues" and so need not "put up with any more stuff I don’t want to. Finito." Deciding this "was the most liberating thing in the world.”
Other environmental tidbits: THK met JFK at Earth Day in 1990 and reconnected (after her husband's death) as delegates to the Earth Summit in Rio in 1992.