Climate change and environmental activists lay on the grass during a protest marking a global climate action day under the theme ''#AfricaIsNotADumpster'' at the Uhuru Park's Freedom Corner in Nairobi, Kenya, September 25, 2020.

Fridays for Future activists protest calling for a "Global Day of Climate Action" in Vienna, Austria, September 25, 2020.

A demonstrator holds a sign as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Vienna, Austria, September 25, 2020.

Fridays for Future activists protest calling for a "Global Day of Climate Action" in Vienna, Austria, September 25, 2020.

A Filipino climate activist wearing a face shield with the words "Climate Justice Now" poses showing her hand as part of global climate change protests, in Quezon City, Metro Manila, Philippines September 25, 2020.

A child wears plastic bottle waste provided by climate change and environmental activists as they protest marking a global climate action day under the theme ''#AfricaIsNotADumpster'' at the Uhuru Park's Freedom Corner in Nairobi, Kenya, September 25, 2020.

Fridays for Future activists protest calling for a "Global Day of Climate Action" in Berlin, Germany, September 25, 2020.

Swedish climate change activist Greta Thunberg holds a sign reading "School strike for climate" as she protests in front of the Swedish Parliament in Stockholm, Sweden September 25, 2020. TT News Agency/Janerik Henriksson via REUTERS

A demonstrator holds a placard as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Berlin, Germany, September 25, 2020.

Ambrose Hayes, a 15-year-old climate change activist, rides on a barge during an event as part of the Fund Our Future Not Gas climate rally in Sydney Harbour, Sydney, Australia, September 25, 2020. Image used for illustrative purpose

A woman holds a placard as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Warsaw, Poland, September 25, 2020.

Women gesture as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Warsaw, Poland, September 25, 2020.

Climate change and environmental activists wearing plastic bottle waste prepare to parade during a protest marking a global climate action day under the theme ''#AfricaIsNotADumpster'' at the Uhuru Park's Freedom Corner in Nairobi, Kenya, September 25, 2020.

Fridays for Future activists hold placards as they protest calling for a "Global Day of Climate Action" in Kyiv, Ukraine September 25, 2020.

A girl gestures as she takes part in a demonstration as part of a global day of action on climate change at the school in Khayelitsha township near Cape Town, South Africa, September 25, 2020.

A demonstrator holds a placard as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Berlin, Germany, September 25, 2020.

Young activists gesture as they take part in a demonstration during a global day of action on climate change in Khayelitsha township near Cape Town, South Africa, September 25, 2020.

A woman holds a sign as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Hamburg, Germany, September 25, 2020.

A demonstrator holds a sign as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Berlin, Germany, September 25, 2020.

Protestors carry placards as they demonstrate as part of a global day of action on climate change outside parliament in Cape Town, South Africa, September 25, 2020.

A demonstrator holds a sign as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Vienna, Austria, September 25, 2020.

Filipino climate activists hold placards calling for climate action as a part of global climate change protests, in Quezon City, Metro Manila, Philippines, September 25, 2020.

A man holds a placard as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Kyiv, Ukraine September 25, 2020.

Demonstrators hold a sign as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Vienna, Austria, September 25, 2020.

Demonstrators hold a sign as Fridays for Future activists protest calling for a "Global Day of Climate Action" in Hamburg, Germany, September 25, 2020.

Fridays for Future activists hold placards as they protest calling for a "Global Day of Climate Action" in Kyiv, Ukraine September 25, 2020.