Word: per
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Dates: during 1990-1999
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...Casuals" are theoretically workers who works less than 17.5 hours per week or for no less than three months, and as a result receive no benefits and lower wages...
...these shows last in a cable universe crowded with pay-per-view, The Man Show's ubiquitous women on trampolines and a score of ways to see topless women without sitting through bad adventure plots? Probably not. Unless, of course, they star Pamela Anderson...
...commerce--since our species learned to control fire. Throughout the developing world today, one of the first things people do as they climb out of poverty is to shift from their peasant diet of mainly grains and beans to one that is rich in pork or beef. Since 1950, per capita consumption of meat around the globe has more than doubled...
...systematic herding and farming, we changed the natural balances irrevocably. The shift enabled us to produce food surpluses, but the surpluses also allowed us to reproduce prodigiously. When we did, it became only a matter of time before we could no longer have the large area of wildland, per individual, that is necessary to sustain a top-predator species...
There is one fact, though, that everyone agrees on: the amount of carbon dioxide in the atmosphere is increasing steadily. It is near 360 parts per million today, vs. 315 p.p.m. in 1958 (when modern measurements started) and 270 p.p.m. in preindustrial times (as measured by air bubbles trapped in the Greenland ice sheet...