Thousands gather for climate change march in Australia

Protesters marched into the Domain, in Sydney's central business district, carrying handmade signs and chanting for climate policy change.

Similar protests, inspired by the 16-year-old Swedish activist Greta Thunberg, are planned in some 150 countries on Friday (September 20).

The aim is for students and others from around the world to speak in one voice about the impending effects of climate change on the planet.

The strike will culminate in New York when Thunberg, who has been nominated for a Nobel prize for her climate activism, will spearhead a march at the home of the United Nations headquarters.