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121. Simply using energy and fuel efficiently could stop us releasing much of the carbon dioxide we currently emit.

122. The failure of the Martian greenhouse effect is obviously not due to any shortage of carbon dioxide!

123. The changing world climate is probably due to a build-up of harmful gases such as carbon dioxide.

124. That is a neat package for increasing the output of carbon dioxide into the atmosphere.

125. The southern California air basin is the only area in the country that still fails to meet the nitrogen dioxide standard.

126. This same basic cycle could also operate on the interconversion of carbon dioxide into carbon monoxide plus oxygen.

127. The government has committed itself to reducing carbon dioxide emissions to 1990 levels by the year 2000.

128. The country's 22.5 million cars emit 20 percent of total carbon dioxide emissions.

129. When carbon monoxide is the reducing agent, carbon dioxide is produced.

130. Recorded emissions of sulphur dioxide were 2.67 million tonnes in 1992, while nitrous oxides totalled 701,645 tonnes.

131. The maximum rate of carbon dioxide generation, in contrast, appears to occur at maturities of less than 0.4%.

132. Some species create carbon dioxide at a faster rate than others of equal size.

133. Carbon dioxide is a so-called greenhouse gas, which absorbs energy from the sun,(www.Sentencedict.com) making the air warmer.

134. Just as you can remove sulphur from power station emissions so you can do the same with carbon dioxide.

135. So more and more coal, gas and oil are burned producing more carbon dioxide.

136. When calcium carbonate is heated it decomposes into calcium oxide and carbon dioxide.

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

138. To achieve a balance of oxygen and carbon dioxide, one human needed 8 square metres of exposed Chlorella.

139. The thin carbon dioxide atmosphere on Mars admits sunlight to the surface with very little attenuation.

140. In combination with oxygen it forms the gas carbon dioxide.

141. In particular, the air now contains only about 0.05 percent of carbon dioxide: a trace indeed.

142. The device contains a carbon dioxide cylinder which released gas into a coiled chamber.

143. Levels of sulphur dioxide in the air reached 2,400 microgrammes per cubic metre over the weekend.

144. Atmospheric carbon dioxide in the northern hemisphere is increasing measurably.

145. Carbon dioxide is not highly toxic to animals or humans in small amounts.

146. If not, shortages of the other nutrients, such as nitrogen, could halt the growth benefits of more carbon dioxide.

147. For plants to photosynthesise and produce sugars in their leaf cells, they need to absorb large amounts of carbon dioxide.

148. A variety of simple terrestrial life-forms can thrive in a medium of liquid water with carbon dioxide and ammonia available.

149. They were surprised to find that carbon dioxide concentrations were higher in water taken from inside the algal blooms than outside it.

150. They also remove the carbon and make it available to plants as carbon dioxide.