>> John Kerry, arriving at major climate talks in Vienna. The US Secretary of State is joining officials from some 200 countries, all working to hammer out a deal in the fight against global warming.>> The Vienna meeting could be the most significant breakthrough in slowing climate change since the Paris agreement last year.
>> Reuter's Alister Doyle and Oslos' leaders want to finalize a timeline for when to phase out potent chemicals known as HFCs, which are used in fridges and air conditioning units.>> These things are really powerful greenhouse gasses. By some projections, by getting rid of these gasses, you could slow global warming this century by about 0.5 degrees Celsius.
>> It's hoped that the meeting will lay the ground work for an official agreement to be signed in October. But there are several obstacles still ahead.>> Developing countries say that they need more funds to help phase out these chemicals, and say they need more time. There's also concern this agreement will hit them hardest in that they are more reliant on air-conditioning, for example, than the countries up in the north.
So they want guarantees that they won't be penalized by this and put under excessive strain for their economies.>> The pressure for results is on. The World Meteorological Organization announced Thursday, the Earth is on track for its hottest year on record.