But the company and the state of Nebraska has said it needs six to nine months for the environmental assessment to be done after that route is identified.

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Environmental and community pressures will rightfully alter the route and slow down trains.

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But the Woodland Trust warned that conservation groups were potentially on a collision course with the government over the environmental impact on the HS2 high-speed rail route between London and Birmingham.

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Francis, patron saint of the environmental movement, we tried repeatedly to find a route up Monte Subasio that avoided the trash of picnickers or the roar of traffic from the motorway below, to no avail.

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Kent Olsen, who heads the Route 125 venture, says government should cover environmental approval risks.

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After the environmental impact reviews are done, all landowners along a proposed route must be notified.

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Opposition to the pipeline began to rally among radical environmental groups long before any of them had the first clue about the pipeline route.

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No-one in the trust will hazard a guess as to when "London's lost route to the sea" might be fully reopened but three engineering and environmental studies have concluded it is viable.

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