Experts do not entirely understand why halons are so effective.

Consumption of halons 1211, 1301, and 2402 must be frozen by 1992.

The prohibition against manufacturing halons will not immediately block their use.

What other government regulations or industry standards concerning halons should I be aware of?

Germany, another producer of halons, is banning their use later this year.

"What it means is that voluntary and mandated reductions in halons are working."

Are there any federal laws on emissions of halons?

The use of halons will be frozen at 1986 levels starting in 1994, with no rollback.

Halons disrupt a fire's chemistry, although the exact process is not well understood.

The manufacture of halons is also to be ended, although their use can continue until supplies are exhausted.

Later, halons, chemicals used in fire extinguishers, were added to the list of suspects.

The Dutch government has helped to set up a national halons "bank" to ensure the most effective use of the chemicals.

Halons are chlorofluorocarbons which cause damage to the ozone layer.

Halons - used mainly in fire extinguishers - are to be abolished by the year 2000.

"First, it sharply reduces the rate at which halons escape into the atmosphere.

The use of halons in firefighting equipment is now banned, except for military and aviation uses.

When was the production of halons banned?

However, problems have already arisen over the definition of 'essential' as applied to the halons.

The tropopause does not act as a barrier to transmission of freons and halons, however.

Along with Halons 1211, 2402, and 1301, it is the most effective fire extinguishers, however, also the most toxic one.

The delegates set an even earlier deadline, Jan. 1, 1994, for chemicals known as halons which are used in fire extinguishers.

A cap was put on future production of halons, another class of ozone-destroying chemicals, as well.

We will ban the use of CFCs and halons by 1994.

Halons stop combustion in enclosed areas within seconds, usually without requiring the evacuation of people near the flames.

It is Amendment No 34. Halons are very dangerous.