Federal research dollars for study of solar power dwindled after the Carter administration, and oil became cheap and plentiful again.

CNN: Will solar energy come into the mainstream?

For a case study in the positive power of regret consider the case of Tom Cox.

WSJ: The Experts: Dealing With Regret

One reason for BMI's tenacity can be seen in the availability of so many patients for the JAMA study, enough to provide the statistical power to detect 6% differences in mortality among groups.

WSJ: A Good Way to Measure Obesity? Fat Chance

Our nuclear power plants have undergone exhaustive study, and have been declared safe for any number of extreme contingencies.

WHITEHOUSE: Standing with Japan

According to a study conducted by Joseph Romm of the Center for Energy and Climate Solutions, the Sure Power system reduces carbon dioxide emissions by 46 percent a year compared to emissions of traditional uninterruptible power supplies and their standby diesel generators.

CNN: Fuel cell power helps bank make money

As unthinkable as that proposal sounds to modern ears, in those days no one had even conceived of an environmental impact study and upstream towns along the river turned out to be no match for big city political power.

FORBES: Currents Of The U.S. Economy Run In Chicago River's Twisted History