More recent research is piled toward the top of the pyramid, where most public debate takes place.

As this damage accumulates, it can lead to malfunctioning cells or cell death.

17. Once air masses reach Antarctica, pollutant particles and gases are incorporated into snowflakes and deposited as snow.

POPs are chemicals that remain intact in the environment for long periods, become widely distributed geographically, accumulate in the fatty tissue of living organisms and are toxic to humans and wildlife.

Radioactive waste was steadily building up at reactor sites throughout the world, none of which had plans for preventing the release of toxic carcinogenic material into the biosphere, where it would contaminate the food chain for the rest of time.

Obviously, Apple has been asking that question for years. Traditional companies must learn to ask it as well.

It really comes from the fact that certain long term obligations health care, where innovation makes it more expensive, early retirement and pension, where the age structure gets worse for you, and just generosity that these mis accounting things allow to develop over time, that you've got a problem.

Although there are some genetic predispositions in a small fraction of cancers, the major fraction is due to a set of new genetic mutations that originally appear and accumulate in one or a small number of cells that will divide to form the tumor and are not transmitted to the progeny (somatic mutations).