From EPA's P2Week website:
The best way to protect the Earth and its people is to stop creating pollution in the first place – that realization became America's official policy in 1990 with the federal Pollution Prevention Act's declaration that "pollution should be prevented or reduced at the source whenever feasible.”
Pollution Prevention (P2) Week highlights the efforts of EPA, its partners, and the public in making pollution prevention a cornerstone of sustainability. It's a great time to take stock and to renew our efforts.
For more information about P2 Week and what you can do to participate, visit http://www2.epa.gov/p2week.