Agence France-Presse: US senators on Wednesday introduced long-awaited legislation to curb carbon emissions blamed for global warming, a key priority for President Barack Obama. Here are some of the main points of the “American Power Act” authored by Senators John Kerry, a Democrat from Massachusetts, and Joe Lieberman, an independent from Connecticut: – GOALS The bill seeks to reduce carbon emissions by 17 percent by 2020 compared with 2005 levels. Further cuts would eliminate 42 percent of …