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A colourless, odourless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 per cent) and is absorbed by plants in photosynthesis.
- ‘These can be used to tackle climate change by absorbing carbon dioxide, and also as a replacement for mineral oil.’
- ‘It is the only beer in which carbon dioxide and nitrogen are present.’
- ‘The carbon dioxide absorbed by the rape seed plants as they grow compensates for that produced when it burns.’
- ‘The second mechanism is keeping the already produced carbon dioxide through correct breathing.’
- ‘Because we would be producing alcohol instead of carbon dioxide and lactic acid whenever we respired.’
- ‘Thus in severe exercise we exhale more carbon dioxide than the oxygen we absorb.’
- ‘So one huge mountain of this stuff in every mine and it's absorbing carbon dioxide.’
- ‘When harmful gases like carbon dioxide are released into the atmosphere they form a dense layer around the earth.’
- ‘This difference makes it possible for organisms to build up carbon compounds from carbon dioxide.’
- ‘When carbon dioxide from the air combines with rainwater, a weak carbonic acid is formed.’
- ‘It also accounts for over a quarter of a million tonnes of carbon dioxide, the main greenhouse gas.’
- ‘Using energy, mainly by burning fossil fuels, produces waste carbon dioxide.’
- ‘Normally wine is protected from air during fermentation by the blanket of carbon dioxide produced.’
- ‘It does not produce any more carbon dioxide than the methane that we already have.’
- ‘If carbon dioxide is not absorbed in sufficient quantities, this will make global temperatures rise.’
- ‘This fixed air is carbon dioxide, into which carbonates decompose when heated.’
- ‘A surprise inspection by the EPA found that we were releasing too much carbon dioxide into the air.’
- ‘Partial pressures of ethylene and carbon dioxide were checked regularly during the treatments.’
- ‘For example, plants give out oxygen and animals expel carbon dioxide and methane.’
- ‘Air is made up of three main types of gases: oxygen, carbon dioxide, and nitrogen.’
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