Negative Externality

In the nineteenth and early twentieth centuries, a smog settled over London. It was called the London Fog, or Pea Soup.

This article analyzes data from many studies on the impact of big-box stores.

This website is an excellent guide to understanding externalities.

Judge quashes order to repaint London house, in win for property developer who denied choosing colour scheme out of spite

Catching live fish using cyanide is easy. Crush a couple of sodium cyanide tablets into a squeegee bottle of water, dive around a coral reef, find a fish you fancy, and squirt the toxic liquid into its face. The mixture stuns the fish without killing it, making it easy to catch in a net, or even by hand.

When NPR's reporting team traveled deep into the Amazon rain forest to report on the environment, they took planes, a truck, and a motorcycle. Lots of fuel was burned. Lots of carbon was emitted. They felt guilty. In the process of reporting on the environment, were they making the problem worse?

If Art sells potato chips to Betty, both Art and Betty are happy with the transaction. Betty has chips, and Art has been paid for them.

A brief video covering the concept of externalities.