Students demonstrate during a worldwide protest demanding action on climate change, in Rome, Friday, Sept. 27, 2019. The protests are inspired by Swedish teenager Greta Thunberg, who spoke to world leaders at a United Nations summit this week. Writing on banner reads in Italian' "Change the system, not the climate."
Thousands of people march on Parliament to protest climate change in Wellington, New Zealand, Friday, Sept. 27, 2019. The protest in New Zealand was part of a second wave of protests around the world as the United Nations General Assembly met in New York.
President Donald Trump and first lady Melania Trump welcome Australian Prime Minister Scott Morrison and his wife Jenny Morrison during a State Arrival Ceremony on the South Lawn of the White House in Washington, Friday, Sept. 20, 2019, in Washington.
Three persons stand on ice blocks under gallows to protest against the climate policy prior to a 'Friday for Future' climate protest in front of the Brandenburg Gate in Berlin, Germany, Friday, Sept. 20, 2019. Protests of the 'Friday For Futurte' movement against the increase of carbon dioxide emissions are planned Friday in cities around the globe. In the United States more than 800 events were planned Friday, while in Germany more than 400 rallies are expected.
A girl holds a sign during a protest at the Old Town Square in Prague, Czech Republic, Friday, Sept. 20, 2019. Several hundreds of protestors gathered in response to a day of worldwide demonstrations calling for action to guard against climate change.
Environmental activists march a short distance for a rally outside the Department of Environment and Natural Resources to coincide with the global protests on climate change Friday, Sept. 20, 2019 at suburban Quezon city, northeast of Manila, Philippines. Various environmental groups in the country are participating in what is expected to be the world's largest mobilization on climate change known as "Global Climate Strikes."
Steam rises from a nuclear power station next to an old windmill on the River Scheldt in Doel, Belgium, Thursday, Sept. 19, 2019. Political leaders meet Sept. 23, 2019 for a climate summit in New York to ramp up global efforts to tackle the climate crisis.
In this long exposure photo cars drive on a highway in Frankfurt, Germany, early Thursday, Sept. 19, 2019.
Display cars are parked at a Volkswagen dealership in Sydney, Monday, Sept. 16, 2019. Volkswagen has agreed to pay up to 127 million Australian dollars ($87 million) to settle an Australian class action stemming from the 2015 diesel emissions scandal, the German automaker and a lawyer said Monday.
In this Sept. 26, 2015, file photo, Tongan Prime Minister 'Akilisi Pohiva addresses the 2015 Sustainable Development Summit at the United Nations headquarters in New York. Pohiva, who is credited with helping bring democracy to the small Pacific island nation, has died at the Auckland City Hospital on Thursday, Sept. 12, 2019. He was 78.