Renewables call for transmission build

Many US states have ambitious renewable energy targets, but billions need to be spent on transmission infrastructure if this new power is to come on line. Susan Arterian Chang looks at the challenges involved in creating the interstate transmission highway necessary for clean energy to reach its full potential

To date, 24 US states and the District of Columbia have legislated renewable energy portfolio standards. These states - 11 of which have set 20-25% renewables targets to be met by 2025 - consume half of all the electric power produced in the US.

Those targets are challenging, especially since demand for electric power in the US is expected to grow 30% by 2030. But even if sufficient clean sources of power can be generated to meet renewable portfolio targets on deadline, an equally pressing need

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