Those which are in everybody's interest to have, but in no one's interest to provide. Clean air, for example, or the preservation of a rare species of plant or animal.
My company can't make money from providing clean air, a public good, so I won't bother myself with it
by BennySPBU April 25, 2005

by BennySPBU December 10, 2004

by BennySPBU December 08, 2004
