A woman who chained herself to the steering wheel of her car and blocked the Harbour Tunnel is one of 11 climate protesters arrested in Sydney.
The protesters were among a group of 50 to 60 activists who kicked off a week of disruption in Sydney with a march through the city centre on Monday.
Blockade Australia began its threatened protests "to cause disruption to the political and economic systems of Australia which are driving climate destruction", with a group converging at about 8am at Hyde Park.