As published in the Financial Times, May 17th 2024 It is tempting to blame big bad oil companies for emissions scandals, with critical headlines like “Shell sold millions of ‘phantom’ carbon credits” (Report, May 6). But if your government offered to let you magically double your money from an investment that would “have a positive impact”, would you take them up on it? I would. If you were the government and this promise cost you nothing, would you make it? I’d probably do that too.