Hundreds of thousands of protesters have joined rallies across the globe in order to get political leaders to tackle the problem.
More than 500,000 people took part in 2,500 marches around the world on Sunday ahead of Tuesday's UN climate summit set to take place in New York, organisers said.
In London, an estimated 40,000 people paraded past Trafalgar Square and the Houses of Parliament.
Some 310,000 people marched against the use of fossil fuels and oil in New York City.
The Labour party conference has started in Manchester with the result of the Scottish independence referendum overshadowing every announcement made.
Labour leader Ed Miliband has pledged to raise the minimum wage to £8 over the course of the next Parliament if elected in 2015 - but the constitutional reforms promised to Scots if they voted No has already dominated the conference.
Mr Miliband has had to fend off accusations he opposes a ban on non-English MPs voting on English laws out of self-interest.
Labour has 40 MPs from Scotland and 29 representing Wales, all of whom are eligible to vote on issues which only effect England.
However, Mr Miliband has maintained plans for English votes for English laws would create "two classes of MP".
David Cameron and Ed Miliband are locked in a battle over the Prime Minister's pledge to introduces English votes for English laws alongside greater devolved powers for Scotland.
Cameron had promised to answer the "West Lothian question" - Scottish MPs can vote on solely English issues - by banning non-English MPs from voting on England only issues, as part of his promise to deliver new powers to Scotland.
However, Labour leader Mr Miliband has said he does not want to look at plans for devolved powers to England, Wales and Norther Ireland until Autumn next year - after the general election.
Mr Miliband warned having English MPs vote on English laws only would create a two-tier Parliament and overlooked the effect some English-only policies had on the rest of the UK.
Labour, who have a loyal following in Wales and Scotland, stand to lose influence in Parliament if English votes for English laws is introduced.
What is the best Friends line of all time?
We're looking for viewers to send in videos of themselves re-inacting their favourite ones to celebrate 20 years since the hit TV show first aired.
Examples include: "We were on a break", "How YOU doin", singing Smelly Cat, "My Sandwich...MY SANDWICH..", "Joey doesn't SHARE FOOD".
We've got a great week for you next week - so good in fact that we've even got a little teaser of what you can expect right here!
On Monday we're celebrating 20 years of Friends and Jack Osbourne's in the sunshine state of Florida revealing how you can win the trip of a lifetime, plus we're chatting to Denzel Washington, Kate Hudson, Lindsey Lohan and more!
Celebrities have been tweeting their thoughts on Scotland's decision to vote against independence.
Jonathan Ross, Geri Halliwell and Piers Morgan were some of the celebrities who commented.
What's happened to the pound this morning is that the market didn't like uncertainty.
Scotland has voted No to independence but financially what does that mean to the people in Scotland and the rest of the UK?
Money saving expert Martin Lewis joined us in the studio to discuss.