My Turn: New Hampshire needs to invest in ‘negawatts’

New Hampshire’s cheapest source of energy is not megawatts but “negawatts” – the use of energy efficiency measures to squeeze more work out of each unit of electricity or natural gas we consume…The nonprofit Acadia Center determined last year that during the harsh winter of 2013-2014, wholesale electricity prices in New England would have been 24 percent higher without the effect of ratepayer-funded energy efficiency programs…