"HONG KONG — The United States and China are gearing up for a trade war that could catch American users of solar energy in the crossfire."

"A species of Himalayan yew tree that is used to produce Taxol, a chemotherapy drug to treat cancer, is being pushed to the brink of extinction by over-harvesting for medicinal use and collection for fuel, scientists warned on Thursday."

"PARIS — The International Energy Agency warned Wednesday that the world is hurtling toward irreversible climate change and will lose the chance to limit warming if it doesn’t take bold action in the next five years."

"A black asteroid as big as an aircraft carrier zoomed past Earth on Tuesday, delighting astronomers who trained telescopes on the ancient body in hopes of learning more about its composition and origin."

"United Nations weapons inspectors have amassed a trove of new evidence that they say makes a 'credible' case that 'Iran has carried out activities relevant to the development of a nuclear device,' and that the project may still be under way."

'A 300-square-mile portion of the Pine Island Glacier is expected to break off in the next few months, creating a massive Antarctic iceberg. The glacier is contributing the sea-level rise.'

"CANNES, France -- The leaders of the G-20 group of major economies wrapped up their two-day annual meeting on Friday with promises to finance the fight against climate change through the Green Climate Fund, protect the marine environment from oil spills, and promote low-carbon development strategies.

In their joint Communique, the government leaders said, 'We are committed to promote sustainable development and green growth and to continue our efforts to face the challenge of climate change.'

"The global output of heat-trapping carbon dioxide jumped by the biggest amount on record, the U.S. Department of Energy calculated, a sign of how feeble the world's efforts are at slowing man-made global warming."

"Tokyo Electric Power Co. detected signs of nuclear fission at its crippled Fukushima atomic power plant, raising the risk of increased radiation emissions. No increase in radiation was found at the site and the situation is under control, officials said."

"Traditional agriculture methods could help protect food supplies and make agriculture more resilient to the effects of climate change, a report by the UK-based International Institute for Environment and Development (IIED) said on Monday."