An anonymous reader shares a report: Imagine demanding an "honest" debate over the cost of net zero in a report full of errors that even a schoolboy would be embarrassed about. Then imagine getting coverage of your report in the Sun, Times, Daily Mail, Daily Express and Spectator. Sound impossible? Well, let me tell you how Civitas, one of the thinktanks housed at 55 Tufton Street in London, did exactly that, and nearly got away with it. On Wednesday, Civitas published a pamphlet on net zero by Ewen Stewart, whose consultancy, Walbrook Economics, works on "the interaction of macroeconomics, politics and capital markets." Stewart is also a climate sceptic, having written in 2021 that human-caused warming is a "contested theory." Along with Civitas, 55 Tufton Street also houses the climate-sceptic lobby group the Global Warming Policy Foundation and its campaigning arm Net Zero Watch. These groups previously attempted to spark an "honest debate about the cost of net-zero" in 2020.

The Civitas report claims to offer a "realistic" $5.5tn estimate of the cost of reaching net zero emissions by 2050 and says "the government need to be honest with the British people." This estimate is much higher than the figure produced by the government's official adviser, the Climate Change Committee (CCC), which has said that reaching net zero would require net investments of $1.71tn by 2050. Note the difference between Civitas's "costs" and the CCC's "net investments." The CCC also found that reaching net zero would generate savings in the form of lower fossil fuel bills worth $1.34tn, resulting in a net cost of $0.37tn. In his report for Civitas, Stewart adopts the well-worn climate-sceptic tactic of simply ignoring these savings. He also ignores what the Office for Budget Responsibility has called the potentially "catastrophic economic and fiscal consequences" of unmitigated climate change. The report was timed to follow hot on the heels of Rishi Sunak's big climate speech, in which he called for an "honest" approach to net zero that ends "unacceptable costs."