9:54 a.m. ET, April 17, 2019
Who are Extinction Rebellion?
From CNN's Stephanie Bailey
Demonstrators gather during a climate protest in Parliament Square in London on Monday.
Kirsty Wigglesworth/AP
Environmental activists are holding a third consecutive day of climate protests in London on Wednesday.
This round of demonstrations -- organized by a grassroots environmental group known as Extinction Rebellion (XR) -- are due to continue for two weeks.
What is Extinction Rebellion?
An "international movement that uses non-violent civil disobedience to achieve radical change in order to minimise the risk of human extinction and ecological collapse,"
according to its website.
The group, which was founded by British activists, first
rose to prominence last year when it caused disruption outside Buckingham Palace, Downing Street and brought London traffic to a standstill by blockading five bridges.
The disruptions this week have seen activists target four sites: Marble Arch, Oxford Circus, Parliament Square and Waterloo Bridge.
What is XR trying to achieve?
The group has three aims: the first is to get governments to declare a "climate emergency," reduce net greenhouse gas emissions to zero by 2025, and for citizens' assemblies to lead the government on climate and ecological justice.
Why do some of the activists want to be arrested?
The group believes that significant numbers of people will have to get arrested and cause disruption for the government to pay attention to their demands.
Read more about the group here: