Good Business: Return on investment

Inside: What the last Beetle means. Transition bonds market gets ready for prime time. Fossil fuels are not that efficient. Salt-water fishing on the Great Plains could be the future of sustainable fish. Amazon.com has a sub-prime day of worker protests. The SEC takes a step back from refereeing shareholder resolutions. — Eric Roston

The end-use efficiency of fossil fuels is much lower than previously thought, according to an analysis in the journal Nature Energy.