One was a small group of scientists who were becoming desperately concerned about population growth, pollution and rapidly increasing use of natural resources.
The net result on air pollution of a large population of electric vehicles may well be negligible.
Because when you educate a girl you educate a family, reduce over-population, reduce disease, reduce pollution and environmental impact, reduce terrorism and a whole host of other world problems.
The changes could not be explained by other factors - such as mother's age and socioeconomic status or population effects such as changes in air pollution and influenza epidemics.
But before you get too smug about its smog, consider this: 154.5 million Americans, just over half the nation's population, live in areas where air pollution levels are often dangerous to breathe.
Following the heavy pollution of the beach, the local population of this starfish fell from more than a hundred and fifty to just thirteen, pushing this particular colony to the edge of extinction.
BBC: News | UK | West Wales recovering from 'environmental disaster'
During the consultations governance challenges in arid and semi-arid areas were discussed and how institutions can be better equipped to deal with risks and uncertainties, emerging out of climate change, population growth, urban-rural tensions and groundwater pollution.
These include increasing social disparities and inequity, population growth, climate change, the deterioration and pollution of the environment, the unsustainable use of freshwater and depletion of ocean resources, as well as increasing cases of natural and human-made disasters.
Delhi Metro is essential for curbing congestion and pollution in the capital, which boasts a population of 16 million.
After taking samples from 21 spots along the coast, researchers expected to find the most caffeine pollution in areas near wastewater treatment plants, large population centers or rivers and streams emptying into the ocean, said Elise Granek, assistant professor of Environmental Science and Management at Portland State.
Instead, they found high caffeine levels near Carl Washburne State Park and Cape Lookout, two areas not near the potential pollution sources, and low levels of caffeine near large population centers such as Astoria, Warrenton and Coos Bay.
From the middle of last century the population of Chinese paddlefish has declined rapidly due to overfishing, habitat degradation and pollution.
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