a colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain

a colourless gas which is given off during fossil fuel combustion.

A polluting gas formed from sulphur. It is produced when fossil fuels are burnt.

A colourless gas produced by burning sulphur.

A pungent toxic gas that is a major pollutant associated with electric generation from sulfur fuels through non-renewable sources.

Gas formed by the burning of fossil fuels, including fuel oil and diesel fuel, that contain small amounts of sulphur. SO2 emissions can result in acidification of soils and lakes.

a greenhouse gas emission resulting from the combustion of fossil fuels.

a gas which is the leading cause in contributing to the formation of acid rain

A compound of sulphur and oxygen produced by burning sulphur.

Gas produced mostly from human activities (such as metal smelting, and fossil fuel combustion by factories, power plants and motor vehicles). Sulphur dioxide combines with water vapor to form sulphuric acid, a contributor to acid rain. Human exposure to sulphur dioxide emissions can also cause respiratory problems.

A colourless gas with irritating odour, formed when sulphur burns in air. Dissolves in water to give sulphurous acid.

EPA uses six "criteria pollutants" as indicators of air quality, and has established for each of them a maximum concentration above which adverse.  SO2 is also a primary contributor to acid deposition, or acid rain, which causes acidification of lakes and streams and can damage trees, crops, historic buildings and statues. In addition, sulfur compounds in the air contribute to visibility impairment in large parts of the country.  See Attainment

Gas produced by burning sulphur-containing fuels and as a by-product in chemical pulping. Reacts with oxygen and water vapour in the air to produce sulphuric and sulphurous acids, which dissolve in rain, causing acidification of soil and water

An industrial gas which is used mainly by the forest industry and is manufactured, for example, by burning elementary sulphur or by means of its recovery from process gases. It is also an acidification-causing emission that is produced when sulphur-containing fuels are burnt.

forms when sulphur combines with oxygen in the air; major air pollutant that forms both smog and acid rain; major source: industrial processes

A gas consisting of sulphur and oxygen formed during combustion of sulphur-containing fuels such as black liquor and oil. In contact with damp air, sulphur dioxide is converted into sulphuric acid which causes acid precipitation.

A poisonous gas formed by burning hydrogen sulphide (or other sulphur compounds).

Used as anti-oxidant. Notice the small label on the back of the bottle; 'Preservative 220 added'.

Used since Roman times to preserve, disinfect and reduce oxidation in wines.

is an inhibitor of microbiological growth and is a preservative (Food Additive code No. 220).

an anti-oxidant used in red and white wines; acts to preserve the wine.

Used to kill wild yeast's, sterilize equipment and prevent oxidation. A naturally occurring substance.

the most common and most useful winemaking additive used since Roman times, used mainly as a preservative, disinfectant and to ward off oxidation. Its use has been declining as consumers have become less tolerant of the freshly-struck match smell associated with sulphur. Some asthmatics also react badly to high doses of sulphur, which has lead to some countries' requiring the legend 'contains sulfites/sulphites' on wine labels. A tiny but increasing proportion of wines are made using no sulphur at all but they tend to be more fragile than most. Sulphur reacts readily with many other wine ingredients to form bound sulphur; it is only free sulphur which can be detected, although sensitivities vary considerably between individuals.

An important and age-old additive in winemaking. Sulphur is an antiseptic and antioxidant. If used correctly it should be imperceptible.

Used in the vinification process to inhibit bacterial growth and prevent oxidation. The level of carbon dioxide used in wine production is generally higher for white wine than it is for red wine and in comparison to food standards is quite low. Wines that contain sulphur dioxide carry the number 220 it the list of ingredients.

The use of sulphur to sterilise wine is almost as old as wine itself (in the Iliad, Achilles fumigated his cup with sulphur before pouring a libation to Zeus). Today, small but effective amounts are used as the standard sterilising agent for barrels.

A substance used in winemaking as a preservative.

Traditionally used to protect wine from oxidation and microbial activity during aging.