"There are some countries in the world where the air is so polluted you can forget about coming home with a healthy holiday glow."

"As tensions mount and U.S. lawmakers push for stiffer sanctions on Russia for its role in the Ukraine crisis, oil giant ExxonMobil wants no part of it."

"Runaway growth in the emission of greenhouse gases is swamping all political efforts to deal with the problem, raising the risk of “severe, pervasive and irreversible impacts” over the coming decades, according to a draft of a major new United Nations report."

"The Obama administration is working to forge a sweeping international climate change agreement to compel nations to cut their planet-warming fossil fuel emissions, but without ratification from Congress."

"A European satellite has shown ice sheets shrinking at 120 cubic miles a year in Antarctica and Greenland"

"New research from NASA's Goddard Space Flight Center shows that large quantities of a chemical responsible for depleting the ozone layer are still being emitted, even years after an international ban."

"The ice of Antarctica doesn’t faze birds. Nor does the heat of the tropics. They thrive in the desert, in swamps, on the open ocean, on sheer rock faces, on treeless tundra, atop airless mountaintops and burrowed into barren soil."

"An activist’s controversial crusade against genetically modified crops."

"The Atlantic Ocean has masked global warming this century by soaking up vast amounts of heat from the atmosphere in a shift likely to reverse from around 2030 and spur fast temperature rises, scientists said."

"Europe's ageing nuclear fleet will undergo more prolonged outages over the next few years, reducing the reliability of power supply and costing plant operators many millions of dollars."