Google Inc is in the early stages of looking at ways to write software that would fully integrate plug-in hybrid vehicles to the power grid, minimize strain on the grid and help utilities manage vehicle charging load.

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So climate change opens up the Northeast Passage as a trade "pipeline" - and will Russia use it to blackmail the west? It could be the next Suez, Roger Howard argues.

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"The reasons to disbelieve that humans are causing global warming are many and varied, skeptics say. For example: Natural factors such as long-term variations in solar radiation are causing the rise in worldwide average temperature.

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Everybody knows that trees are good for the climate, because they absorb greenhouse gas carbon dioxide, right? Maybe not, says a team of US and French climate experts. They say that whether or not trees help fight global warming depends on where they are.

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