Past winners in the environmental space include William D. Nordhaus, Al Gore, and the Intergovernmental Panel on Climate Change. "We are striking because we have done our homework and they have not".
But one lorry which was brought to a stop became a stage for the young protesters.
Schoolchildren take part in a student climate protest on March 15, 2019 in London, England.
Some schools may take a harder stance on activism-related absences, but if they do that would be at the discretion of the school's principal, said district spokesman Harry Esteve.
- Protests in Madrid and more than 50 other Spanish cities drew thousands.
Greta Thunberg, in August a year ago, became the face of a "school strike" outside the Swedish parliament building.
"One can't expect children and young people to see all of the global connections, what's technically reasonable and economically possible", said the head of Germany's pro-business Free Democratic Party, Christian Lindner.
Friday's rallies are expected to be one of the biggest global actions yet.
This will be the third climate student rally Hamilton has staged, and says she hasn't received any grief from her school.
Volker Quaschning, a professor of engineering at Berlin's University of Applied Sciences, said it was easy for politicians to belittle students.
The 2015 Paris climate conference pledged to keep increase in global average temperatures to below 2 degrees Celsius (35 F) above pre-industrial levels requires a radical cutback in use of coal and fossil fuels.
I want to protest because climate change is a really important issue.
The latest strike is expected to be much larger than the first, held last month, when around 600 Scots were among around 15,000 youngsters across the United Kingdom who skipped school to protest.
Says a statement on the Youth Climate Strike website, "We, the youth of America, are striking because decades of inaction has left us with just 11 years to change the trajectory of the worst effects of climate change, according to the October 2018 UN IPCC Report".
The group was later invited to meet officials at the Ministry of Natural Resources and Environment in two weeks.
The students say they have heard teens from other schools, including Halifax West, Charles P. Allen, and Eastern Passage, will join them.
"It's totally unfair considering they have been representing (voters) with the expectations they will do what's in the best interests of the country", she said.
Morning rain cleared in time for the masses to come together at 12.30pm, all with the same goal - to support an worldwide movement for governments to make changes towards preserving the planet.
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