It plans to shut down some of Canada's busiest bridges on Monday, in line with protests around the world; including the Angus L. Macdonald Bridge over Halifax Harbour, the Burrard Street bridge in Vancouver and the Prince Edward Viaduct in Toronto, by having protesters lie down or sit in traffic lanes, according to The Canadian Press.
In New Zealand, Extinction Rebellion Aotearoa has blocked off a street in the capital city Wellington on Monday.
Adrian Cummins, chief executive of the Restaurants' Association of Ireland, said people will try to avoid the city centre if they think there is going to be gridlock.
Climate crisis activists gather in Battery Park during Extinction Rebellion demonstrations in NY.
The protests are the latest stage in an global campaign for tougher and swifter steps against climate change coordinated by Extinction Rebellion, which rose to prominence in April when it snarled traffic in central London for 11 days.
Campaigners want governments to declare a climate and ecological emergency, reduce greenhouse gas emissions to zero by 2025, halt biodiversity loss and be led by new "citizens' assemblies on climate and ecological justice".
Members of Extinction Rebellion said police confiscated six vehicles as well as gazebos, portable toilets and bean bags - and have since claimed that the arrests were pre-emptive.
Here's a look at what's happening across the country. The Metropolitan Police said 135 arrests had been made by early afternoon.
"They have received orders that this bridge has to be open". More than 1,000 activists were arrested at that time, of whom 850 were prosecuted for various public disorder offences.
Some of the protesters doused the city's charging bull statue near Wall Street with fake blood as part of the protest against climate change.
Before leaving Leinster House, the group unveiled a large pink boat, which was pulled by ropes through the city, before ending at Merrion Square Park, opposite the Taoiseach's office.
Thirty minutes later the blockade was cleared and traffic began flowing freely.
Hundreds of demonstrators from the Extinction Rebellion group blocked the road and set up tents early Monday.
"Somehow this is all supposed to be in the name of environment, but hundreds of cars are now idling unnecessarily as they wait", he wrote.
They are backed by Thunberg, the Swedish teenager whose searing United Nations address in September made global headlines, and by academics studying the rising temperatures and sea levels. As a result, commuters have been warned to expect delays and disruptions.
Responding to criticism of the disruption the protests will cause, she said: "We really apologise to Londoners for the disruption but this is two weeks, compared with the risk of mass starvation and the end of society as we know it".
Just after 9 a.m., police issued another tweet, saying the bridge was closed to traffic in both directions.