Sentences with phrase «lower ozone pollution»

Not exact matches

This is what's known about the dynamics of the stratosphere: Increasing clouds of low - lying ozone, made from the reaction between sunlight and pollution, are showing up in the western U.S. that have little or no industrial activity.

The most recent research, which covers 1989 to 1992, and correlates tree sickness with low - level ozone pollution (This Week, 18 June 1994), is due to be published soon.

Ozone seemed to stunt the trees: Saplings in rural areas, where there was less pollution but more ozone, were smaller than urban trees, which experienced dirtier air and lower ozone leOzone seemed to stunt the trees: Saplings in rural areas, where there was less pollution but more ozone, were smaller than urban trees, which experienced dirtier air and lower ozone leozone, were smaller than urban trees, which experienced dirtier air and lower ozone leozone levels.

This is, in fact, how the United States tackled past pollution challenges like acid rain and ozone depletion: First we created low - cost alternatives, and then we implemented regulations to require their widespread adoption.

For ozone pollution, most cities improved, with some dropping to their lowest levels ever.

Older coal plants will continue to be hamstrung by the cost of complying with non-climate pollution rules (such as the ozone air quality standards), plus the perhaps even lower price of natural gas.