Warming of Alaska has dire consequences for state; effects of 7-degree rise in Alaska's temperature over last 30 years include buckling highways, shoreline erosion and forests killed by beatles; in Alaska, rising temperatures, whether caused by greenhouse gas emissions or nature in prolonged mood swing, are not a topic of debate or an abstraction; Sen Ted Stevens says that no place is experiencing more startling change from rising temperatures than Alaska and that problems will cost Alaska hundreds of millions of dollars; photos (M)
Observations From Members 
