In 2012, Hide continued to write opinion articles in the press questioning climate science and emissions trading schemes. In the "National Business Review", Hide claimed that the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report in 2007 was 'infamously wrong' and contained schoolboy errors and had been written by people who had to 'believe the human-induced global warming nonsense before they start'. In the Herald, Hide said that the New Zealand Emissions Trading Scheme (ETS) is a 'scam and a waste'. Hide agreed that CO2 from fossil fuels is a greenhouse gas that has caused warming, but that the warming wasn't worrying until the effect had been multiplied with computer models that are programmed to cause scary climate change.