Across large portions of North America and Europe, the beginning of spring has been cold. Scientists have now attributed that to the intense loss of Arctic sea ice caused by climate change.
They focused on its implications, how the public perceives it, and the attempt by conservatives to deny its very existence.
2012 - a year marked by droughts, brushfires, and crop damage, was the hottest year on record for the lower 48 U.S. states.
There may not yet be the political will in Congress to pass significant climate change legislation. But efforts to address this issue will continue to get strong support from Mother Nature.
Each conference hears reports about how much the world is depending on these gatherings to develop cooperative international approaches to mitigate and adjust to climate change.
Extreme weather has resulted in more destruction from floods, droughts, and heat waves, and these trends will increase with greater occurrences expected in the future.
Environmentalists, looking to help polar bears already affected by global warming, are pushing for an international ban on the legal trade in polar bear items.