Bill Clinton, global mayors form alliance on climate change (CP via Yahoo! Canada News) LOS ANGELES (AP) - Former U.S. president Bill Clinton and big-city mayors from around the globe announced an initiative to combat climate change and increase energy efficiency in everything from street lights to building materials. [News Source]

22 cities join Clinton anti-warming effort. Twenty-two of the world's largest cities announced yesterday that they will work together to limit their contributions to global warming in an effort led by former president Bill Clinton. [News Source]

The Big Question: What is carbon trading, and can it save the world from global warming? Britain and California, the most populous American state, are to sign a new carbon trading agreement. What is carbon trading anyway? [News Source]

How California failed in efforts to curb its oil addiction. California has doggedly pursued petroleum-free transportation. It has tried to jump-start a range of alternative fuels. None have hit the road. [News Source]

Tower of power. A host of renewable-energy projects are under way in Australia that are making the country the global hotbed of alternative-energy entrepreneurship. [News Source]

Politicians attack, but evidence for global warming doesn’t wilt. Scientists and politicians of every stripe agreed that the world is warming and that global warming is a serious issue. They also agreed to disagree about what's causing it. [News Source]

Clinton unveils global warming initiative. On a stage of political all-stars Tuesday afternoon at UCLA, former President Clinton announced a new initiative to help cities combat global warming. [News Source]

Major world cities team up to fight global warming. Los Angeles, London, New York, Seoul and 18 other cities joined forces on Tuesday in a global warming project aimed at reducing greenhouse gas emissions. [News Source]

Clinton, global mayors form alliance on climate change . Former President Clinton and big-city mayors from around the globe have joined in an initiative to combat climate change and increase energy efficiency in everything from street lights to building materials. [News Source]

Desperate cooling measure is aired. The world might need to radically combat global warming by deliberately injecting a small volcanic eruption's worth of planet-cooling sulfur into the stratosphere, says a Nobel Prize-winning chemist. [News Source]

Global warming likely causing more heat waves, scientists say. Global warming has loaded the dice in favor of heat waves and may be to blame for the scorching weather across much of the United States and Europe this summer. [News Source]