Gazette-Mail: Much more research is needed to determine the extent that greenhouse emissions leak from the processes used to drill for, produce and distribute natural gas, according to a new report that examines the most recent science on the issue. Climate Central, a Princeton, N.J.-based science and journalism organization, said the evidence so far strongly suggests a switch from coal to natural gas is unlikely to provide the 50 percent cut in global warming emissions frequently attributed to such a change...