Massachusetts officials thought they were close to securing future supplies of green energy by piping in hydroelectric power from Canada. But a week after Massachusetts said yes to the $1.6 billion project, neighboring New Hampshire said no, jeopardizing the 192-mile transmission line that would bring in the electricity through the Granite State. The rejection earlier this month marked the latest example of how hard it is to build large energy infrastructure in New England, which is pursuing aggressive renewable power goals and sometimes strains to meet current, pressing electricity needs . The six-state region—where electricity costs are 56% above the national average—is heavily dependent on natural gas-fired power after years of losing older, uneconomic coal , oil and nuclear plants to retirement . Gas is also in high demand for heating area homes. Yet New England sometimes has difficulty importing enough natural gas to satisfy its needs due to […]