Reducing GHG at a net benefit?

Intially referred to on Common Tragedies blog; according to a study done by McKinsey 'Reducing Greenhouse Gas Emissions: How Much and at What Cost?' there are several opportunities in the US to reduce greenhouse gases at a negative cost.

Here is the abatement cost curve:

Interesting that many options are available at a negative cost.

The study admits that it did not account for consumer lifestyle changes, transaction costs and high discount rates. Key issues.

Behaviour should be taken seriously. I think that is something social scientists have argued for a few decades.