"International leaders gathering in Paris to address global warming face increasing pressure to tackle the issue of 'climate refugees.' Some island nations are already looking to move their people to higher ground, even purchasing land elsewhere in preparation. In the U.S. Northwest, sea level rise is forcing a Native American tribe to consider abandoning lands it has inhabited for thousands of years."

"From droughts to pests, disease, wildfire, and extreme weather, the agency spotlights food and agriculture at COP21."

"As world leaders gather in Paris this week to negotiate a new global climate agreement, the U.S. Department of Agriculture (USDA) is sounding the alarm about the enormous challenges ahead for the food we eat.

"The dean of Columbia’s Graduate School of Journalism published a letter on Tuesday strongly disputing accusations by Exxon Mobil that journalists from the school had produced inaccurate and misleading articles about the company’s knowledge of the risks of climate change."

"ExxonMobil is hurling ethics accusations against a team of Columbia University journalists whose reporting helped stoke calls for probes into whether the company deliberately misled the public about climate change."

"Visiting Malaysia in November, Obama said he would raise concerns about government transparency and press freedom in his meeting with Prime Minister Najib Razak, who is embroiled in a financial scandal. At a town hall meeting, Obama spoke up for the press being 'able to report on what is happening in current affairs,' and for 'transparency and accountability.' Back home, though, Obama isn’t practicing what he preaches."

"A solid majority of Americans say the United States should join an international treaty to limit the impact of global warming, but on this and other climate-related questions, opinion divides sharply along partisan lines, according to the latest New York Times/CBS News poll."

"The Environmental Protection Agency released its much-delayed biofuel mandate on Monday, raising the amounts of biofuel that refiners are required to blend into conventional vehicle fuel from levels proposed in May."

"World leaders launched an ambitious attempt on Monday to hold back rising temperatures, with the United States and China leading calls for the climate summit in Paris to mark a decisive turn in the fight against global warming."

"LE BOURGET, France — From deserts encroaching on African farmland to rising sea levels shrinking islands of the South Pacific, leaders of poor nations most affected by climate change shared their stories of global warming with leaders of some of the richest on Tuesday."

"As the Paris climate change summit kicks off, China, the world’s leading carbon-emitting country, is choked in pollution. The Ministry of Environmental Protection said Sunday that heavy smog had covered China’s north, including Beijing, for three days in a row."