British actress Emma Thompson talks to members of the news media on Friday, April 19, from atop a boat being used by climate activists to blockade the Oxford Circus junction in central London.
Tolga Akmen/AFP/Getty Images

Climate change activists stage protests across London

Updated 9:30 AM ET, Fri April 19, 2019

British actress Emma Thompson talks to members of the news media on Friday, April 19, from atop a boat being used by climate activists to blockade the Oxford Circus junction in central London.
Tolga Akmen/AFP/Getty Images

Members of the climate activist group, Extinction Rebellion, have called for days of protest across London.

The group has blocked four main traffic arteries in central London since Monday, and on Wednesday it began a day of disruption of the city's overground train network. London's Metropolitan Police confirmed that it has made more than 500 arrests since Monday in relation to the protests.

Founded by British activists, Extinction Rebellion has three stated aims: to get governments to declare a "climate emergency"; to reduce net greenhouse gas emissions to zero by 2025; and for citizens' assemblies to lead the government on climate and ecological justice.