The proposal sent environmental advocates through the ozone layer.

FORBES: The Gas-Guzzler Relief Act

By the time the makers of cigarettes were fighting against legislation on secondary smoking and the makers of chlorofluorocarbons against regulations to protect the ozone layer, their efforts had coalesced into a general attack on the environmental movement and the regulatory bodies it had brought into being.

ECONOMIST: A question of dodgy science

Nitrous oxide is also considered a greenhouse gas and is 310 times more dangerous to the Earth's ozone layer than carbon dioxide, said Joseph Johns, chief of the U.S. attorney's environmental crimes section.

NPR: Feds Raid 17 Calif. Businesses For Nitrous Oxide