Its members protested outside the school with whimsy, turning up with sieves and toys on their heads.

ECONOMIST: Charlemagne

Why do we succumb to so many eco-fads, from grass-fed beef to locavorism to passive solar homes that leak heat like sieves?

FORBES: Debunking The Phony Beliefs Of The Modern Green Movement

Russian buildings leak energy like sieves: they use 425 kilowatt-hours per square metre a year, compared with 135 in Sweden and 120 in the United States.

ECONOMIST: The time-bombs of Tomsk

That changed in the mid-1980s, when microscopic sieves--spread throughout steel tubes 30 feet long and 4 to 5 inches in diameter--were developed to filter out undesirable elements before the whey is dried to a powder for use in food manufacturing.

FORBES: Making Whey

That changed in the mid-1980s, when microscopic sieves--spread throughout steel tubes that are 10 meters long and 10 to 12 centimeters in diameter--were developed to filter out undesirable elements before the whey was dried to a powder for use in food manufacturing.

FORBES: Making Whey