We knew it would be freezing cold - it snowed in Homs while she was there - so I lent her a pair of ill-fitting, Y-fronted longjohns to keep her warm.

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Mr. GREG BOWER (International Association of Bomb Technicians and Investigators): For nitroglycerin to be transportable, it has to be kept very cold, not freezing, but very col.

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Under freezing winter conditions the output can be miniscule because very cold weather and high winds require turbines to be shut down to avoid damage.

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In addition, there will need to be access to large sources of energy to keep the ponds from freezing in cold winter climate areas, and for processing the algae into fuel.

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