At one demonstration in Nice, student Maëlys Defossez, 16, told Connexion: "We are all concerned and this is only the beginning to our actions".
"I think about the hard number of 11 years", said Mufson, who will be 25 years old in 2030.
Friday's rallies were one of the biggest worldwide actions yet. Almost 100 schools are expected to participate, Thunberg said on Twitter.
Protesters including the Raging Grannies, as well Oregon Physicians for Social Responsibility, Friends of the Columbia Gorge and high school students from the Portland Youth Climate Council, gathered in front of City Hall on Wednesday, March 13, to oppose the expansion of Zenith Terminals, which could increase the number of oil trains moving through Portland.
The world's leading climate scientists have warned there is only a dozen years for global warming to be kept to a maximum of 1.5ºC, beyond which even half a degree will significantly worsen the risks of drought, floods, extreme heat and poverty for hundreds of millions of people.
The main thing all the students emphasize is that climate change needs to be taken more seriously.
People walk by the U.S. Capitol building in Washington, U.S., February 8, 2018. Protest signs dotted the crowd.
One parent in attendance said that about 1,000 kids are at the strike, with more "streaming in" all of the time.
Most of the declared Democratic candidates for the White House have already voiced support for the Green New Deal, a measure proposed by Representative Alexandria Ocasio-Cortez - a sweeping 10-year blueprint for combating climate change that involves reducing carbon emissions and retrofitting infrastructure.
Luisa Neubauer, one of the Berlin group organizing Fridays for Future, said politicians should take note of the young.
A website used to coordinate the rallies listed events in over 2,000 cities.
About 17 people were arrested by the New York Police Department for disorderly conduct and blocking traffic
The students are demanding action on climate change - an issue they say was caused by older generations but disproportionately impacts theirs. The youth of this world has started to move and we will not rest again. "There's a very low threshold so we reach a huge number of people".
"On climate change, we have to acknowledge that we have failed", she told global economic leaders in Davos.
Young Derry students at a number of Derry schools will tomorrow leave their classrooms in a staged "strike" to attend a protest on climate change.
Raphael Devautour, high school student said it was his first protest.
While in Auckland, thousands of protestors made their voices heard.
Brigham Young University students are also set to participate.
What they're standing for, they said, is what they're standing on: the planet.
The world is now 1ºC warmer than preindustrial levels.
He said students from across the province and around the world share the same sentiment.
The group was later invited to meet officials at the Ministry of Natural Resources and Environment in two weeks.
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Senior ministers were meeting for a special political Cabinet at 10 Downing Street as debate got under way in the Commons. These included seven Cabinet ministers. "But I think it could have been negotiated in a different manner, frankly".