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.
Right at the minute the English are getting a rotten deal.
UKIP leader Nigel Farage has told Good Morning Britain that "England needs a voice" and that we should start making changes today.
"The English do need a parliament of some kind," he added, "we need a constitutional convention to work out how we can have a fair federal United Kingdom where all four parts of the Kingdom get a fair say."
Actor Brian Cox said that regardless of the result, today has been "a tremendously proud day in many ways".
The prominent supporter of independence added, "we've managed to shake the political establishment to its roots".
Former Foreign Secretary William Hague spoke to John Stapleton this morning, he said, "when it is clear, as the Prime Minister has made it clear, we are going to look at the UK as a whole."
He added that greater power for people at the local level is "part of the development for the United Kingdom."
Kenny MacAskill MSP has told Good Morning Britain that he wants to see "the detail and delivery" of Cameron's devolution pledge.
Speaking to Ben Shephard and Susanna Reid he said: "We do expect the delivery and we do expect significant devolution."