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61 In general coals contain carbon, hydrogen, oxygen, nitrogen and sulphur with various other trace elements.

62 Natural gas is also virtually free of the lead, sulphur, particulates and aromatic hydrocarbons that cause pollution at street level.

63 Gaseous oxides formed from sulphur, nitrogen and other substances also have to be scrubbed out and neutralised.

64 This amount is equalled by naturally forming sulphur that originates mainly from volcanoes and huge clusters of marine bacteria.

65 Beside the kitchen a communal bath, fed from a hot sulphur spring, was built into the wall.

66 A chemist would say that the colour comes from sulphur molecules trapped within the crystalline matrix of the stone.

67 From the street, the yodel of a sulphur blender could be heard, extolling the virtues of his ointments.

68 FoE says that the stations are sited in areas where World Health Organization guidelines on sulphur emissions were breached last year.

69 I have known it to be successfully treated with black sulphur powder mixed with water but prevention is better than cure.

70 Electricity comes from three power stations on the coast which burn three percent sulphur oil.

71 Removing these areas of high sensitivity will make targets for reduction of sulphur dioxide emissions easier to reach.

72 Commercially dried apricots are exposed to sulphur dioxide to preserve their colour,[http://sentencedict.com/sulphur.html] before they are dried in hot air.

73 Chester was still trying to persuade the Committee that there was no urgency about reducing sulphur emissions.

74 A model system relates energy consumption to emissions of sulphur and nitrogen oxide emissions.

75 Mr Brown had promised a 2p cut from this month in the price of ultra-low sulphur petrol.

76 Sulphur dioxide and carbon dioxide are two common chemical compounds.

77 Cyanobacteria still exist today, like the purple sulphur bacteria which glean hydrogen from hydrogen-sulphide to provide sulphur compounds as oxidation products.

78 This would not matter much, were it not for a whiff of sulphur from other Virgin companies.

79 The lime was mixed with flowers of sulphur so that the walls would give off sulphurous fumes when they got warm.

80 Apart from general operating conditions, it has set emission limits for sulphur dioxide, nitrogen dioxide and carbon monoxide.

81 Investigators suspect that many of the cargoes of coal had a high sulphur content.

82 The basic unit of trade will be the right to emit one ton of sulphur dioxide into the atmosphere each year.

83 It is hoped this will cut the sulphur content of coal emissions by between 50 and 70 percent.

84 The subsidies are planned to cut sulphur emissions from lorries by a quarter.

85 And I suppose we'd better go and asphyxiate ourselves up at the sulphur springs.

86 Pressure is however increasing for measures to cut sulphur emission.

87 And burning coal, of course, produces, carbon dioxide as well as sulphur dioxide.

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

89 Diagenetic pyrite in the Lower Palaeozoic rocks of the Southern Uplands provided a sulphur reservoir.

90 Cells of the bacteria were heavily mineralised with uranium, calcium, vanadium, bismuth, selenium and sulphur.