1.   From Los Angeles to Athens, city authorities have tried to enact measures to limit exhaust emissions.

2.   Government officials have acknowledged that existing policies to limit acidic emissions - notably of sulphur dioxide - are inadequate.

3.   The law is designed to limit harmful emissions.

4.   The new air pollution controls are designed to limit harmful emissions from industry and motor vehicles.

5.   President Bush has signed into law a series of new air pollution controls, designed to limit harmful emissions from industry and motor vehicles.

6.   Government officials have acknowledged that existing policies to limit acidic emissions -- notably of sulphur dioxide -- are inadequate.

7.   Under this binding treaty, states were required to take steps to limit the emission of greenhouse gases, notably carbon dioxide.

8.   The outcome of the coal review will be among matters taken into consideration in preparing a national plan for meeting international obligations to limit carbon dioxide emissions.

9.   And if the Clinton administration has its way, a similar system of market-based permits will someday be used to limit global emissions of greenhouse gases.

10.   But because coal gives off more carbon dioxide than any other fuel, a treaty to limit emissions of greenhouse gases would hit that union hardest.