Humans have been influencing landscapes and ecosystems on a global scale for far longer than people usually think, archeologists said in a newly published study.

"A team of scientists at Harvard University says it has come up with a bionic leaf — a system that could use solar power and hydrogen-eating bacteria to generate liquid fuel. The findings, described in the journal Science, offer an alternative path to making carbon-neutral solar fuels."

"'Advancing the ambitious climate change and clean energy agenda' and 'further enhancing our security and diplomatic cooperation across the Indo-Pacific region,' would be the focus of discussions between India and the U.S during Prime Minister Narendra Modi’s visit this week, a State Department official told The Hindu."

"Bernie Sanders, traipsing across far-flung regions of California as he seeks a comeback victory here next week, swatted at likely Republican presidential nominee Donald Trump for minimizing the state’s water shortage and the effects of climate change."

"Secretary of State John Kerry lambasted any future president who would tear up the international climate agreement the U.S. signed in April."

"Report from US Geological Survey says northern wildfires must now be seen as significant driver of climate change, not just a side-effect".

Scientists are finding still another region of ice in Antarctica that may be unstable because of climate change -- and contribute to sea-level rise.

"While Arctic ice is melting at a record pace, a team of NASA-led researchers say they can explain why Antarctic sea ice has been edging in the opposite direction. That paradox has puzzled scientists for years and given climate-change deniers fodder to dispute global warming."

"Efforts in Congress are heating up to bring some relief to California’s historic drought, just as the dry summer season is starting."

"Mass coral bleaching has destroyed at least 35 percent of the northern and central Great Barrier Reef, Australian scientists said on Monday, a major blow to the World Heritage Site that attracts about A$5 billion ($3.59 billion) in tourism each year."