Last updated:Â 28 august, 2009 - 09:26 GMT
Artificial trees: the future for carbon capture?
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In Britain, a review of the way technology can be used to tackle climate change has recommended using artificial trees.
Algae units could be designed into new buildings or retrofitted to old ones
Many climate scientists believe the world has only a few decades to reduce emissions before there is so much carbon dioxide in the atmosphere that a dangerous rise in global temperature is inevitable.
The UK's Institution of Mechanical Engineers says that methods such as artificial trees, algae carbon capture and reflective roofs should be used on a short-term basis to buy the world time.
However, in the long term, the institution believes it is vital to reduce emissions.
Dr Tim Fox is the institution's head of Environment and Climate Change.
First broadcast 27 August 2009
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