Floating fences in India. Whimsical water- and solar-driven conveyor belts with googly eyes in Baltimore. Rechargeable aquatic drones and a bubble barrier in The Netherlands.

These are some of the sophisticated and at times low-tech inventions being deployed to capture plastic trash in rivers and streams before it can pollute the world's oceans.

Rich countries including the European Union and the United States have pushed back against efforts to put financial help for poor nations suffering the devastating effects of global warming firmly on the agenda for this year's U.N. climate summit.

Observers and campaigners attending a ten-day preparatory meeting in Bonn, Germany, that's wrapping up Thursday expressed frustration at the resistance shown by developed nations to formally discussing how poor countries can get more aid when they're hit by climate disasters.

A private company that uses satellites to spot sources of methane emissions around the globe has said that it detected one of the largest artificial releases of the potent greenhouse gas ever seen, coming from a coal mine in Russia earlier this year.

Montreal-based GHGSat said one of its satellites, known as 'Hugo,' observed 13 methane plumes at the Raspadskaya mine in Siberia on Jan. 14. The incident likely resulted in about 90 metric tons of methane being belched into the atmosphere in the space of an hour, the company calculated.

Australia's new government on Thursday formally committed to a more ambitious greenhouse gas reduction target of 43% by the end of the decade in fulfillment of a key election pledge.

The previous conservative government was dumped by voters at the May 21 election after it stuck to a seven-year-old pledge to reduce Australia's emissions by only 26% to 28% below 2005 levels by 2030.

Damaging floodwaters that tore through Yellowstone National Park menaced communities downstream where residents cleaned up from the mess and kept an eye on rising river levels while others braced for the economic fallout while the park remains closed.

After wiping out miles of roads and untold number of bridges in the park and swamping hundreds of homes in surrounding communities, the roiling waters threatened to cut off fresh drinking water supplies to Montana's largest city.

French officials warned Thursday that a record pre-summer heatwave was spreading north from Spain, where authorities were fighting several forest fires as the country sizzles under a sixth day of sweltering temperatures.

The Meteo France weather service said it was the earliest hot spell to hit the country since at least 2005, worsening a drought caused by an unusually dry winter and spring and raising the risk of forest fires.

From crop-wilting drought to the creeping devastation of rising seas, climate change is already bringing death, destruction and hefty costs to vulnerable nations, spurring growing calls for richer countries to help them cope in a warming world.    

Microscopic air pollution caused mostly by burning fossil fuels shortens lives worldwide by more than two years, researchers reported Tuesday. 

The French government announced 500 million euros on Tuesday to encourage urban vegetation projects to tackle high temperatures in towns and cities as a heatwave began to strike in the south and southwest.

The Western U.S. has marked another day of hot, dry and windy weather as crews from California to New Mexico battled wildfires that had forced hundreds of people to leave their homes.

Roughly 2,500 homes have been evacuated because of two wildfires burning on the outskirts of Flagstaff in northern Arizona, officials said at an afternoon briefing.