CO2 is an essential plant food and is a beneficent, essential part of the atmosphere for this purpose.

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Even though the pumps were not essential since the plant is in a scheduled refueling shut down, and plant operators even moved a portable pump into the threatened building in case the regular pump had been submerged, the sense was that things were amiss.

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"Safeguarding the future of the plant was essential for both the 280 employees and the local community, " she said.

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Environmentalists, like John Walke of Natural Resources Defense Council, say the Bush administration is abandoning an essential tool to force those plant to clean up fast.

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"Distillation fulfilled a poetic side in me, I very much felt there was poetry in the chemistry between the fire and the plant to produce essential oils, " he told CNN.

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The UN nuclear watchdog has called on the operators of Japan's Fukushima plant to improve "essential systems" amid continued leaks and power cuts.

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Existing membranes cater to the desalination industry and haven't combined the two essential features needed for an osmotic power plant, said Skilhagen.

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He and his top engineers meet several times a week with U.S. officials, including Crear, on how to repair existing equipment, like the 100, 000-gallon-a-minute water treatment plant near Gharmat Ali, essential to restoring water injection into the Rumallah oilfields.

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The St Merryn plant in Merthyr Tydfil is the largest single meat processing and packing plant in the UK, according to Vion which described its decision to sell as not easy but essential.

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