United Nations chief Guterres: Climate 'point of no return' is hurtling towards us

Student activists from School Strike for Climate Australia hold a protest outside of the office of the Liberal Party

6,30,000 people across 500 cities in Germany alone came together for movement.

"This is what societies are demanding", Ribera said, noting that efforts would be made to "try to ensure that the demands by young people to raise climate ambition echo throughout COP25".

Thunberg, meanwhile, was on a boat sailing across the Atlantic, but tweeted a photo of herself holding a sign that said "School strike for climate".

Miss Thunberg has spent the previous year travelling the world, mostly using public transport and transatlantic yachts, speaking to world leaders and encouraging others to take part in climate strikes every Friday - a trend she began in Sweden.

House Speaker Nancy Pelosi will lead a group of Democratic lawmakers to a United Nations conference on climate change less than a month after the Trump administration began formally withdrawing the U.S. from the Paris climate accord. In rance, protestors took aim at "Black Friday" sales in shops and malls and protestors even blicked the distribution centre of Amazon the online retail giant on the outskirts of Paris.

Further rallies were taking places in cities worldwide, including Washington, London, Berlin and Madrid.

Billionaire former New York Mayor Michael Bloomberg was the last person to hold the post.

But activists say the government continues to take actions which will prevent the country from reaching its decarbonisation goals.

In Montreal, environmental groups distributed second-hand clothing.

Students in the United States protested ahead of COP25.

The target of the protesters' ire was Prime Minister Scott Morrison, who has angrily denied any link between the fires and climate change while defending his support for fossil fuels.

Australia, with a population of 25 million, has low carbon emissions compared with the planet's biggest polluters, but is one of the world's leading coal exporters.

"Our government's inaction on the climate crisis has supercharged bushfires", 18-year-old Shiann Broderic, one of the event's organisers, whose home was destroyed in a bushfire, told Reuters News Agency.

Several hundred people took to the streets in Lisbon in Portugal, where Greta Thunberg is due to arrive before making her way to Madrid for the climate summit.

"This is about doing something that you believe in", 23-year-old Saumya Chowdhury said. "We want the government to acknowledge this and have a conversation on this issue with people".

The UN chief's comments were clearly aimed at the handful of countries responsible for more than half of global greenhouse gas emissions, though he did not call them out by name.

The meeting will focus largely on finalizing the "rulebook" for the 2015 Paris climate treaty, which becomes operational in 2021.

The UN has reported that greenhouse gas levels in the atmosphere, the main driver of climate change, hit a record high past year.

The UN has also warned that global temperatures are on track to rise nearly 4 degrees Celsius by the end of the century, which could make some places virtually uninhabitable.



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