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91. Alan Townshend, professor of analytical chemistry at Hull, agrees that phasing out carbon tetrachloride is a minor worry.

92. In graphite the carbon atoms are arranged in flat hexagons layered on top of each other.

93. As levels of atmospheric carbon dioxide and methane increase, the greenhouse effect will trap increasing amounts of heat.

94. Any molecule with this group attached to a carbon atom is called an alcohol.

95. Make sure the protein skimmer is working properly and renew the activated carbon.

96. They were keen to combat acid rain, freeze carbon dioxide emissions and improve public transport.

97. The high-temperature electrolysis scheme that we explored in connection with a lunar base can separate carbon dioxide into oxygen and carbon monoxide.

98. Ash and biodegradable waste must be added regularly to achieve the right carbon nitrogen ratio.

99. Estimating the future rate of energy growth is of critical importance for predicting future concentration of atmospheric carbon dioxide.

100. This surface reaction of oxygen and carbon releases carbon monoxide which migrates outward and upon encountering oxygen burns to carbon dioxide.

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

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

103. To her annoyance Holly pushed the carbon copy on to Rain's desk and went away with the other.

104. Carbon is the smallest atom in the fourth column of the periodic table of elements.

105. In this case, air stripping precedes a conventional biological process, while carbon adsorption is used as a final polishing step.

106. In the other two mechanisms, buckminsterfullerene is formed by a combination of specific precursor carbon clusters.

107. And if so, what would that tell about the way the carbon skeleton is bonded together?

108. Carbon has three naturally occurring isotopes, that is, atoms of the same atomic number but different atomic weights.

109. Carbon dioxide is a so-called greenhouse gas, which absorbs energy from the sun, making the air warmer.

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

111. To achieve a balance of oxygen and carbon dioxide,[Sentence dictionary] one human needed 8 square metres of exposed Chlorella.

112. The estimated global emissions of carbon from fossil fuels alone have tripled since 1950.

113. The standard requires detectors to sound before carbon monoxide levels exceed 100 parts per million for 90 minutes.

114. The new Bernard's is not a carbon copy of the original.

115. Carbon monoxide Carbon monoxide is a poisonous gas which, when inhaled, limits the body's capacity to absorb oxygen.

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

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

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

119. This would reduce the ability of the living world to take up carbon dioxide.

120. Tests on 16 fossilised shellfish showed that acid dating is as accurate as carbon dating.