Associated Press: The United States, China and India must be part of the follow-up treaty to the Kyoto Protocol and agree to cut carbon emissions, Denmark’s prime minister said Saturday. Japan’s leader offered them a bold strategy for doing it. Climate change returned to the fore at the World Economic Forum’s annual meeting, where Japanese Prime Minister Yasuo Fukuda proposed a 2020 deadline for countries to boost their energy efficiency by 30 percent. He added that Japan would try to spread its …