Last week’s IEA World Energy Outlook forecast modest renewable uptake globally in a number of scenarios. In its most optimistic outlook for solar and wind, the International Energy Agency (IEA) expects total deployment growth essentially of 0% through 2040, and 20 to 40% decreases in pessimistic scenarios. Future Smart Strategies’ Ray Wills has long been critical of the agency’s renewable modeling. Here, he sets out why he believes the group has got it wrong again.