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121 Although U/V, ozone and protein skimmers were known, reference books often claimed they were unnecessary.

122 They calculate that ozone is depleted fastest when the sun is least active.

123 Ozone occurs more frequently at higher altitudes, so uplands may be particularly at risk.

124 Results of the autumn and spring nitric acid measurements are shown in Fig. 2, together with total column ozone data.

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125 Another bolt of lightning struck behind him, and Eugene felt the air seared into ozone on either side of him.

126 As with acid rain and ozone depletion, international co-ordination of government policy is required to tackle the free rider problem.

127 It has no effect on stratospheric ozone, and no measurable impact on climate.

128 From the standpoint of the ozone layer, there is a quite different way of responding to the allotment phenomenon.

129 Estimates of the effect of the few Concordes currently in operation are that they have a negligible impact on the ozone layer.

130 This ozone layer is important to society and the environment for two reasons.

131 Another excellent chapter deals with the greenhouse effect and ozone depletion, which Brennan admits is a personal hobbyhorse.

132 It covers ozone depletion, ground level ozone and global warming.

133 I can do experiments in the greenhouse that show that red spruce are harmed by ozone and acid deposition.

134 International co-operation on protecting the ozone layer has been good.

135 Ozone has been considered as a candidate rocket propellant for over sixty years.

136 Thanks to wind drift, the highest ozone levels are often found in country areas.

137 Government ministers admit that ozone levels are higher than anywhere else in the world.

138 Global environmental problems, such as deforestation and ozone depletion, should be tackled through inter-governmental agreements, rather than unilateral action.

139 The loss of the ozone layer is also believed to be having a cooling effect.

140 Finally, we should comment on the relative abundance of ozone and hydrogen peroxide at Cape Grim.

141 In the most sensitive cases yields were reduced by 1 percent for every 1 percent cut in the ozone layer.

142 This was seen as essential if such countries were to co-operate in efforts to protect the ozone layer.

143 He told me that the ozone travels up the steep canyons of the western flank on a daily basis.

144 The measured seasonal variations of peroxide and ozone in clean air at Cape Grim during the experiment are contrasted in Fig. 4.

145 This Conservative Government has taken a lead in working to protect the ozone layer.

146 The depletion of the ozone layer has been one of the most dramatic discoveries about our planet in recent years.

147 Low-level ozone is produced by the effects of sunlight on car fumes.

148 For a start the Protocol does not cover all the chemicals that deplete the ozone layer.

149 The remainder have escaped into the atmosphere to cause further depletion of the ozone layer.

150 But because ultraviolet radiation is a constant feature of solar radiation, the ozone layer is maintained.