It's sadly ironic that coal plants are making the planet hotter and cooler at the same time, and using natural gas can't fix that.
41 of the lower 48 states had above-normal, much-above-normal, or a record warmest July.
In 2007 the largest recorded tundra fire in the circumpolar arctic released approximately as much carbon into the atmosphere as the tundra has stored in the previous 50 years.
The true social cost of carbon emissions could be up to 40 times higher than government estimates, which has a big impact on policies.
Australia's Labor Party tries mightily to impose a carbon tax, but it will be a tough battle.
Major investments are needed worldwide in clean energy technologies, sustainable farming and forestry techniques, and climate-proofing of infrastructure.
Only the President can approve the pipeline from Canada; direct action planned for Washington DC in August.
A 21st century communications economy could break the link between economic growth and growing greenhouse gas emissions.
In a Rolling Stone magazine essay, Gore says Obama has made many small steps, but has failed to use the bully pulpit and take real leadership.
This climate change ruling is the most significant since the 2007 Clean Air Act decision.