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“Evolving life must experience a vast range of possibilities, based on environmental histories so unpredictable that no realized route - the pathway to consciousness in the form of Homo sapiens or Little Green Men, for example - can be construed as a highway to heaven, but must be viewed as a tortuous track rutted with uncountable obstacles and festooned with innumerable alternative branches. Any reasonably precise repetition of our earthly route on another planet therefore becomes wildly improbable even in a trillion cases.”

“Contempt for science could perhaps depend on the fact that, science hasn't been able to solve any of our basic problems, for example the environmental pollution or the problems with HIV and AIDS. This is the worst disease of our time, and scientists are lost. I believe that many people are disappointed with science when the answers we need are not delivered.”

“The river, for example, is the living symbol of all the life it sustains or nourishes - fish, aquatic insects, water ouzels, otter, fisher, deer, elk, bear, and all other animals, including man, who are dependent on it or who enjoy it for its sight, its sound, or its life. The river as plaintiff speaks for the ecological unit of life that is part of it.”

“Although population and consumption are societal issues, technology is the business of business. If economic activity must increase tenfold over what it is today to support a population nearly double its current size, then technology will have to reduce its impact twenty-fold merely to keep the planet at its current levels of environmental impact. For example, to stabilize the climate we may have to reduce real carbon emissions by as much as 80 percent, while simultaneously growing the world economy by an order of magnitude.”

“We continually make decisions in private which affect the commonweal, as the ecologists (to take but one example) have shown us. When I keep my house warmer than it needs to be, I consume fuel which might help someone else keep warm, or keep a job. When the food I eat is high on the protein chain I contribute to a maldistribution of protein around the world. When I teach my children to be primarily concerned with private gain, I diminish the ranks of public leadership in the rising generation.”

“We discover too late that we have turned a blind eye to the extinction of a species that is essential to the balance of life in a particular context. Or we discover too late that the importation of a foreign life-form, animal or vegetable, has upset local ecosystems, damaging soil or neighbouring life-forms. We discover that we have come near the end of supplies-of fossil-fuels for example -on which we have built immense structures of routine expectation.”

“... laws governing pollution tend to move pollutants from one medium to another. So, for example, we scrub SO2 from power plants only to dispose toxic sludge on land. We "clean" water only to disperse toxic-laced solids on farmland or landfills. Pollution control becomes a kind of giant shell game by which we move pollutants between air, water, groundwater, and land.”

“Each summer, for example, nitrogen and phosphate washing from farmlands in the Mississippi Valley enter the Gulf of Mexico, creating a massive algal bloom covering some 16,000 square kilometers. As the blooms die off, this area-roughly the size of New Jersey-is so deprived of oxygen that no fish survive.”

“The military is the largest polluter in the country, and so you have a lot of military waste contaminating reservations - as, for example, on the Skull Valley Goshute Reservation, where 5,000 sheep died in some kind of experimental military nerve gas test 10 years ago. Many of our communities are dealing with that kind of waste, and an absence of political will to clean them up.”

“We can decide that the presence of cancer-causing substances in our air, water, and food is too expensive. A 2009 study, for example, has found that coal miners in Appalachia costs the region five times more in premature deaths, including from cancer, than it provides to the region in jobs, taxes, and economic benefits. In California, the production and use of hazardous chemicals cost the state $2.6 billion in 2004 alone in lost wages and health-care expenses to treat workers and children with pollution-linked diseases.”

“Perhaps the simplest example is a synthetic plastic, which unlike natural materials, is not degraded by biological decay. It therefore persists as rubbish or is burned-in both cases causing pollution. In the same way, a substance such as DDT or lead, which plays no role in the chemistry of life and interferes with the actions of substances that do, is bound to cause ecological damage if sufficiently concentrated.”

“Those people who say that America is finite are some sense right. The environmental movement, for example, has a great wisdom to it: we need to protect, to preserve, to shelter as much as we need to develop. But I think this always has to be juxtaposed against the optimism of old, which is now represented in part by immigrants. I would like to see America achieve a kind of balance between optimism and tragedy, between possibility and skepticism.”