The Dutch government said Tuesday it would appeal a landmark court ruling ordering it to slash greenhouse gases across the country by 25 percent by 2020.

The June judgment had been hailed as a "milestone" by climate experts after 900 Dutch citizens went to court in a bid to force a national reduction of emissions blamed for global warming.

U.S. President Barack Obama warned Monday that climate change is no longer a problem of the future, but rather a challenge for now and one that will define the next century.

Describing the "urgent and growing" threat that was not being addressed quick enough, Obama sketched the problems already facing people living in one of America's last wilderness frontiers.

When it comes to coping with climate change in the Arctic region, which is warming at three times the global average, some animals are more equal than others.

Migrating Barnacle geese that fly north to lay eggs amid the Norwegian Arctic's craggy peaks and melting glaciers are adapting very well, thank you, at least for now.

Climate change will boost the odds up to 14-fold for extremely rare, hard-to-predict tropical cyclones for parts of Australia, the United States and Dubai by 2100, researchers said Monday.

The research, published in the journal Nature Climate Change, used a new approach to predict the frequency and intensity of rare superstorms dubbed "grey swans".

High sea temperatures off the coast of Qatar threaten precious coral reef and have caused mass deaths among some 20 types of fish, Doha-based marine researchers said on Monday.

A study carried out by experts from Qatar University and the environment ministry last week has revealed that water temperatures during the fierce Gulf summer have passed 6 degrees celsius (97 farenheit).

Key climate negotiations opened in Bonn on Monday with a top U.N. official warning there was not enough money to host a year-end Paris conference tasked with sealing a global carbon-curbing pact.

Addressing delegates, U.N. climate chief Christiana Figueres said there was insufficent "funding for participation for either the October session, which is already planned, or for the COP."

Scientists are "overwhelmingly unified" in concluding that humans are contributing to global climate change, Secretary of State John Kerry said Sunday night, and the public is slowly getting the full picture.

Skeptics who stand in the way of action to respond to climate change will not be remembered kindly, he told Alaska reporters.

Billionaire climate philanthropist George Soros invested more than $2m (£1.3m) in struggling coal giants Peabody Energy and Arch Coal in recent months, despite having once called the fuel “lethal” to the climate.

Filings with the Securities and Exchange commission show that between April and June this year Soros Fund Management (SFM) bought more than 1m shares in Peabody ($2.25m), the world’s largest private coal company, and 500,000 shares in Arch ($188,000).

Ioane Teitiota and Angua Erika and their three New Zealand-born children have lost claims for refugee status due to global warming.

Mr Teitiota has been battling deportation to Kiribati since 2011, when he overstayed his visa.

International organizations could be overestimating emissions from China, the world's biggest producer of greenhouse gas because of problems in the way they calculate their data, said a study published by Nature on Wednesday.

With talks on a new global climate accord set to take place in Paris in December, China, the world's biggest producer of climate-warming gas, has promised to bring emissions to a peak by "around 2030", but it remains unclear how much CO2 China is actually producing and how much it will produce in 15 years.