Associated Press: The new climate change science report by the federal government looks at effects of global warming on specific U.S. regions and forecasts what’s to come: NORTHEAST Already: Winter temperatures have increased by 4 degrees since 1970. Future: Even warmer winters, harm to the ski industry, extreme heat and polluted air in the summer. The maple syrup industry may move north. SOUTHEAST: Already: Spring rainfall is down nearly 30 percent since …