"Julia Whitty is on a three-week-long journey aboard the the US Coast Guard icebreaker Healy, following a team of scientists who are investigating how a changing climate might be affecting the chemistry of ocean and atmosphere in the Arctic."

"Climate change is expected to drop water levels in the Great Lakes, experts said Wednesday. Levels could drop anywhere from a few inches to several feet as water evaporates in the drought conditions."

"Mitt Romney's campaign opened an attack on the Obama administration's climate change policies yesterday by warning farmers that greenhouse gas regulations could hike fuel prices. He also suggested that President Obama might pursue a carbon-pinching cap-and-trade program if he wins the election."

"Nearly three-quarters of Americans say global warming influences U.S. weather and made this year's record-hot summer worse, a survey said on Tuesday."

"America is unique when it comes to giving a platform to climate deniers and skeptics. According to a new analysis of data released last year, American newspapers are far more likely to publish uncontested claims from climate deniers, many of whom challenge whether the planet is warming at all and are 'almost exclusively found' in the U.S. media. The study was published in the journal Environmental Research Letters."

"The ice covering the Arctic Ocean was at a record low, in keeping with a sharp warming trend in the far north. At the same time, the amount of the ocean around Antarctica covered by sea ice hit a record high. It's winter in Antarctica when it's summer in the Arctic. But why in a warming world is wintertime ice growing?"

"As carbon dioxide continues to build up in the atmosphere as a result of burning fossil fuels, the seas absorb much of it.The full effects have yet to be felt."

"Drought conditions in the United States eased slightly over the last week, though dry soils and water shortages persisted across wide swaths of important farm states, particularly Nebraska, a key corn and cattle state."

"The first major snowfall of the year and a cold snap set to sweep into the northern Midwest could harm some late-maturing corn and soybeans crops and delay the harvest, an agricultural meteorologist and the National Weather Service said on Thursday."