Thousands of people took to the streets in various cities around the world to demand urgent action against climate change.
The first demonstrations took place in Australia, as part of a global mobilization that included nearly 2,000 marches.
The protesters argue that if greenhouse gas emissions are not reduced the world will experience more droughts, forest fires and storms.
The protests culminated in New York where the United Nations Secretary General Ban Ki-moon, celebrities, business leaders and environmentalists participated.
The day of protest took place two days before the climate summit in New York, which will be held at the UN.
There is no «planet B»
The meeting seeks to give impetus to the initiative to achieve a new international climate agreement to be signed by all nations by the end of 2015.
Tens of thousands of people filled the streets of New York, on a two-mile route, at the climax of the global day of protest against climate change.
Ban Ki-moon walked alongside French Environment Minister Segolene Royal, as well as British primatologist Jane Goodall and former US Vice President Al Gore, who won an Oscar for his documentary «An Inconvenient Truth,» which denounced climate change.
Ban, who received a petition with two million signatures demanding action against global warming, told reporters that to fight climate change «there is no ‘plan B’, because there is no ‘planet B’.»
More than 160 countries were the scene of demonstrations on this day.
The organizers of the protest in New York claim that more than 300,000 people participated in that city alone.
In Australia, some 20,000 people took to the streets of Melbourne to urge Prime Minister Tony Abbott to do more on climate change.
The meeting this Tuesday at the UN headquarters in New York, with 125 heads of state and government, will be the first since the failed climate conference held in Copenhagen in 2009.