Australia will suffer more days of extreme heat and a longer bushfire season as greenhouse gases force temperatures to continue rising, a new report warned Tuesday.

The joint study by the Commonwealth Scientific and Industrial Research Organisation and the Bureau of Meteorology said temperatures across Australia were, on average, almost 1.0 degree Celsius (1.8 degrees Fahrenheit) warmer than a century ago.

Haze shrouded Malaysia's capital and its surroundings on Tuesday, causing "unhealthy" air quality due to fires from a drought that has led to water rationing.

While dry spells are common in the tropical nation, the current two-month heatwave has been unusually long, sparking bushfires and water supply cuts to more than two million people as reservoirs threaten to run dry.

In an oak wood spanning the border of Spain and Portugal, an ancient sight unfolds: wild horses, not saddled or shoed, but roaming free as they did centuries ago.

Farming has declined in Spain, leaving the countryside deserted, conservationists say. Now the wild things are coming back: wolves, vultures and rare herbivores.

Environmental activist group Sea Shepherd claimed Monday that Japanese whalers attacked its vessels in the Southern Ocean, and accused the Australian government of "broken promises" to monitor whaling operations.

Sea Shepherd said Japanese harpoon ships, the Yushin Maru and Yushin Maru 3, towed steel cables across the bow of its vessel the Bob Barker 11 times on Sunday in a bid to jam its propeller and rudder.

The Marshall Islands on Saturday marked 60 years since the devastating U.S. hydrogen bomb test at Bikini Atoll, with angry exiled residents saying they were too fearful to ever go home.

Part of the intense Cold War nuclear arms race, the 15-megaton Bravo test on March 1, 1954 was a thousand times more powerful than the atomic bomb dropped on Hiroshima.

U.S. environmental authorities made a rare move Friday to block a massive copper and gold mine in Alaska before it even gets under way, in a bid to protect wild salmon.

The Pebble Mine project has the potential to be one of the biggest open pit copper mines, but once built, it could threaten the exceptionally rich salmon fishery in the Bristol Bay area, the Environmental Protection Agency explained in a statement.

Malaysia said Friday it will expand water rationing in and around its capital, in a move affecting millions as drought continues to scorch a tropical country usually synonymous with torrential rain.

The national water commission said in a statement over 300,000 households in Kuala Lumpur and nearby Selangor, Malaysia's most populous state, will experience cuts for the whole of March, after a two-month dry spell depleted reservoirs.

Global warming will reduce the world's crop production by up to two percent every decade and wreak $1.45 trillion of economic damage by the end of this century, according to a draft U.N. report, Japanese media said Friday.

The document is the second volume in a long-awaited trilogy by the Intergovernmental Panel on Climate Change (IPCC), a Nobel-winning group of scientists, which is set to be issued next month after a five-day meeting in Japan, the Yomiuri Shimbun reported.

NASA on Wednesday announced a torrent of new planet discoveries, hailing a "bonanza" of 715 worlds now known outside the solar system thanks to the Kepler space telescope's planet-hunting mission.

A new method for verifying potential planets led to the volume of new discoveries from Kepler, which aims to help humans search for other worlds that may be like Earth.

U.S. and British scientific academies said Wednesday there was a clear consensus that climate change is real and will have serious disruptive effects on the planet.

The U.S. National Academy of Sciences and Britain's Royal Society said they were making the joint declaration in hopes of moving the public debate forward -- to the question of how the world responds, instead of whether climate change is happening.