WASHINGTON — Choices made now about carbon dioxide emissions reductions will affect climate change impacts experienced not just over the next few decades but also in coming centuries and millennia, says a new report from the National Research Council.

Climatewire: This time, the heat is really on.

No one is checking to see if they are leaking, investigation finds

A report by the Tellus Institute explores four scenarios in response to sustainability demands, and calls for a profound restructuring of global economic priorities.

Climate scientists have long warned that global warming could unlock vast stores of the greenhouse gas methane that are frozen into the

A new ranking of the world’s nations by environmental performance puts some of the globe’s largest economies far down the list, with the United States sinking to 61st and China to 121st.