Denver Post: Government-backed U.S. scientists on Tuesday urged for the creation of a warning system to help people anticipate the impact of climate change on food, water and cities. Early warnings would give more time to adapt, but they will require much closer monitoring of warming oceans, increasing greenhouse gas emissions, and extinctions of plants and animals, according to the scientists and a report unveiled by a National Research Council committee. There are too many blind spots to be able to anticipate...