sulphur dioxide BrE
sulfur dioxide AmE

Where we have greater problems are, firstly, on sulphur dioxide.

Also, there was a good trace of sulphur dioxide in its atmosphere.

Sulphur dioxide emissions would also increase if that strategy were implemented.

International negotiations on reducing sulphur dioxide emissions have ended without agreement.

Experts have described the coal as similar to natural gas in terms of its sulphur dioxide content.

Sulphur dioxide is produced by volcanoes and in various industrial processes.

Sulphur dioxide can be readily measured with relatively simple laboratory equipment.

Sulphur dioxide emissions are however well below the authorised limit.

The process uses a natural gas flame to break down the effluent into sulphur dioxide.

Some 600 million people live in urban areas where the average level of sulphur dioxide pollution endangers their lives.

Some planets lack water, one with oceans of almost pure sulphur dioxide having been described.

It appears not to be anything chemically fancy like sulphur dioxide or ozone.

They also give off sulphur dioxide, one of the major causes of acid rain.

The second major issue was the maximum level of sulphur dioxide and sulphites permitted in food.

Scientists agree that those steps have helped to reduce contaminants like lead and sulphur dioxide.

Moreover, before 1990 the focus was on reducing sulphur dioxide emissions to fight acid rain.

But acid rain and sulphur dioxide episodes both occurred.

Lichens were wiped out over large areas owing to sulphur dioxide emissions.

Much progress has been made countrywide to reduce sulphur dioxide levels, which have fallen by nearly half since 1970.

The Finnish oil industry has reduced emissions of sulphur dioxide by 80 per cent in the past 12 years.

This is well known for metabisulphites and sulphur dioxide (see p 291).

On May 28, just two weeks later, sulphur dioxide emissions had increased to 5,000 tonnes, ten times the earlier amount.

Two major causes of acid rain are sulphur dioxide and nitrogen oxide.

From 1995 to 2008, sulphur dioxide emissions will be cut in half, the group calculated, despite a tripling of output.

On the other hand, there is not expected to be any difference in emissions of sulphur dioxide and other particles.

For over 48 hours the white smoke from sulfur dioxide could be seen in the air.

It tends to turn back into sulfur dioxide and water again.

There are several ways of measuring sulfur dioxide in the air.

Sulfur dioxide pollution dropped by about 30 percent between 1979 and 1988.

Sulfur dioxide emissions increased until 2006 after which they began to decline.

Released sulfur dioxide however makes the water a strong reducing agent.

Therefore, it is not a conclusive test for sulfur dioxide.

He said the restrictions on sulfur dioxide will be the most stringent in the nation.

In addition, sulfur dioxide cannot be added to organic wines.

Sulfur dioxide is a by-product of other processes in industry.

It is also looking at ways to make sulfur dioxide scrubbers more efficient.

And the pollutants, particularly sulfur dioxide, can be accurately monitored.

Available sulfur dioxide should be maintained at this level until bottling.

Another way to form it is via a glow discharge in sulfur dioxide.

At that time, up to 48,000 pounds per hour of sulfur dioxide were released from this one stack.

The most important gas which leads to acidification is sulfur dioxide.

Sulfur dioxide emissions increased on March 12, 2008 when a new vent opened.

Such paper has maintained its strength for 300 to 800 years, despite sulfur dioxide and other air pollutants.

Sulfur dioxide is a major air pollutant and has significant impacts upon human health.

It can be made by reacting bromine, sulfur dioxide, and water.

Collectively, those measures have reduced several pollutants, including lead and sulfur dioxide.

Sulfur dioxide is a major cause of acid rain.

But when alkaline ammonia is present, the water can hold much more sulfur dioxide.

They also do not produce gases that help make acid rain such as sulfur dioxide.

Matches release sulfur dioxide when they burn, giving them their smell.