Berit Nordgarden and her husband, Eivind Tellefsen, loved their nonpolluting Nissan Leaf electric car . But they found its 85-mile battery life too short for weekend trips to their cottage with their two young children. So the outdoorsy couple took a deep breath and bought a second car: a Tesla Model S luxury sedan with three times the battery range, the best of any electric car on the market. Buying an $87,000 car was a stretch, requiring them to refinance their primary residence, a cozy wooden home in Oslo. But the Tesla would have been completely out of reach — costing perhaps double the price — without generous subsidies and incentives that […]