Bloomberg: The Group of Eight’s climate-change strategy may fail to contain rising temperatures that threaten to cause more floods, droughts and storms. The world’s richest countries, which are responsible for almost half of the world’s emissions, yesterday pledged to reduce the production of heat-trapping pollution by at least 50 percent by 2050. They didn’t specify how those cuts should be reached or provide intermediate targets. The G-8 will press the rest of the world to adopt the …