Environmental Science

Download America's Environmental Report Card: Are We Making the by Harvey Blatt PDF

By Harvey Blatt

An available evaluate of an important environmental concerns dealing with the USA, with new and up to date fabric.

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Extra resources for America's Environmental Report Card: Are We Making the Grade?

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Agricultural use, the main consumer of water, can be reduced by eliminating water wasters such as above-ground irrigation sprayers and adopting water-saving devices such as drip irrigation. Population distribution will adjust automatically. If water is not available, people will relocate to areas where it is. A right to water cannot imply a right to an unlimited amount of water. Resource limitations, ecological constraints, and economic and political factors limit water availability and human use.

Boys born to women exposed to widespread chemicals in pregnancy have smaller and imperfect penises and feminized genitals. They also have a shorter distance between their anus and genitalia, a classic sign of feminization. A study in Holland showed that boys whose mothers had been exposed to PCBs grew up wanting to play with dolls and tea sets rather than with traditionally male toys. ” If terrorists were putting phthalates in our drinking water, we would be galvanized to defend ourselves, but we seem less concerned when we are poisoning ourselves.

In addition to making about half the streams and rivers in the watershed unsafe for drinking, swimming, or recreational contact, the pollution has created a dead zone in the nearshore Gulf of Mexico near the mouth of the river. It covers about 8,000 square miles, the size of Massachusetts, and has been growing since measurements began in 1985. The hypoxia—very low levels of dissolved oxygen—is caused mainly by excess nitrogen from fertilizer used on crops, with corn using the most. The dissolved nitrogen flows into the Gulf and spurs the growth of excess algae.

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