Climate protesters blocking roads and buildings could face prison terms and unlimited fines, the British government said on Tuesday. The announcement came after the activist group Insulate Britain (IB) blocked a number of motorways in the past three weeks, disregarding injunctions against their tactics; and after Extinction Rebellion (XR) blockaded a private airport on Saturday. The apologetic yet adamant activists ran in front of moving traffic on motor ways and glued themselves to motorways, demanding the government to insulate homes across the UK to help cut carbon emissions. The Home Office said it plans to introduce “a suite of amendments” to the Police, Crime, Sentencing, and Courts (PCSC) Bill, which went through its process in the House of Commons and is currently in committee stage in the House of Lords. The government will propose “a new offence of interfering with the operation of key infrastructure—including motorways, railways, and airports—where the impact will affect …