In the past, I have mentioned both marginal abatement cost curves for greenhouse gasses (curves that describe the cost of eliminating each successive tonne of greenhouse gas) and the economic analyses done by McKinsey. Recently, a friend reminded me of an informative graphic from one of their reports:
The whole report is available online. All the options listed on the left hand side, below the horizontal line, are actually projected to save money as well as reduce greenhouse emissions. Those to the right are progressively more expensive, up to about 50 Euros a tonne.
The graphic is quite interesting because it shows a ranking of the cost at which different technologies can achieve emission reductions. It’s also interesting that they projected how many technologies need to be implemented – and to what degree – to achieve stabilization of greenhouse gas levels at 550, 450, and 400 parts per million of CO2 equivalent.
Put on a graphic like this, it all looks very achievable.