The greatest single source of power onstage was Thomas Allen, in his debut as Falstaff.
Coal is, and for years will remain, the largest single source of power.
The International Energy Agency, a conservative forecaster in the best of times, now projects that by 2050 solar power will rise to 27percentt of all electric generation, worldwide, and thus become the biggest single source of power.
There are no parties and no single source of authority: the president shares power with the "supreme leader", Ayatollah Ali Khamenei.
Lawrence Goldstein, president of the Petroleum Industry Research Foundation, said, "We're increasingly dependent on a single source of fuel, natural gas, for power plants, and what's happening in California could be happening in the Northeast".
The biggest single source of air pollution is coal-fired power stations and China, with its large population and heavy reliance on coal power, provides $2.3tn of the annual subsidies.
It works by extracting power from a single source of low-current ambient electromagnetic waves.
2014: Obama Administration unveils rules cutting climate pollution from power plants, the biggest single source of carbon dioxide emissions.
The initiative comes a day after the Senate voted 52-46 to repeal the plan to cut carbon pollution from power plants, the largest single source of US emissions.
By cleaning up our power plants, the largest single source of CO2 pollution, America is leading by example on climate action.
When any single source of fuel accounts for even a third of the power flowing into a grid, the security of that system is difficult to guarantee.
