Wine-producing vineyards in northern California were being adversely affected by the lead emissions.

Over all, airborne lead emissions have declined 94 percent since they peaked in 1976, and vehicle emissions have fallen 97 percent.

Kennecott self-reports 6,235 pounds of lead emissions a year from its smelter smokestack alone.

The first 8,000 years provided a base level of natural lead emissions with which to compare rising levels because of human activity.

The cartridge was also designed to reduce pollution by controlling lead emissions.

This situation reflects the spectacular 94 per cent reduction in total national lead emissions during the 1978-89 period.

Producing one lead acid battery threw off three kilograms of lead emissions, by one estimate.

The agency's annual report Tuesday on air pollution showed a 48 percent reduction in lead emissions and a 32 percent drop in airborne concentrations.

It took three years for officials to negotiate and draft a consent order specifying the steps Revere would take to reduce lead emissions into the air.

The Polish government has published figures on lead emissions for the first time.