Activists are changing the discourse on climate change. Politicians must respond with policies that meet the Paris agreement’s goal of limiting global warming to 1.5C

Climate change is becoming hard to ignore. Extreme weather has grown more frequent. Scientists are loudly and urgently sounding the alarm – and people have noticed. The 10-day Extinction Rebellion protests were the biggest act of mass civil disobedience in the UK for generations. The protests, by people drawn from all sections of society, are sure to have a lasting impact. This month has seen the most mentions of climate change in the British media since the landmark Paris agreement in 2015. The country’s political class has been at pains to show it has been moved by the unprecedented outpouring of political feeling. But politicians need to overhaul policy in a far more substantial way than is currently envisaged to stop net emissions of greenhouse gases. The question is not whether this country should achieve a net zero target, but when. Presently the UK is committed in law to reduce greenhouse gas emissions by at least 80% by 2050 compared to 1990 levels. This is not ambitious enough.

Last year’s UN Intergovernmental Panel on Climate Change report suggested that to limit the warming effect to 1.5C, global CO2 emissions must reach net zero by around 2050. Next week the UK’s Committee on Climate Change is expected to formally recommend the government goes further. Extinction Rebellion (XR) would like the UK to reach zero by 2025. Underlying this ambition is a commendable sentiment but the target is impractical. Britain, as the first country to industrialise and therefore responsible for a large historical stock of carbon dioxide emissions, ought to aspire to reach the UN’s 2050 goal faster, but not as fast as XR demands.

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