It is too late to depend only on the spread and innovation in appropriate technology. We must lead with behavioural change, based on existing buildings, vehicles and equipment, globally coordinated, including job-time sharing and retraining. Perhaps luckily, some recent analysis is showing that methane is as important as carbon dioxide in the short-term. This can be addressed by consuming fewer animal products, draining irrigated rice fields periodically, sealing methane leaks, less biomass (e.g forest) burning, recycling, using methane from waste dumps and other methods. Hydrofluorocarbons, black soot and low level ozone need to be addressed technologically, but this could happen relatively rapidly. We can divide technological spread into relatively rapid, such as large scale diverse tree planting (if sincere and secure) and relatively slow, such as the manufacture of more quality buses.