Certainly, greenhouse gas emissions are not the only consideration to be borne in mind in choosing a particular biofuel, and there is the matter of production-costs and the feasibility of making the fuel on the large scale, if any significant substitution for petroleum-derived fuels is to prove practical.

FORBES: Land Use Changes Are Main Factor In Carbon Emissions From Biofuels

Only they can judge whether the cost can be borne.

ECONOMIST: By invitation: Iraq

The only difference would be that the cost would then be borne directly by drivers in proportion to the number of miles they drive.

FORBES: Washington's Foolish Fuel Policy

But central bank balance sheets are ultimately the liability of taxpayers: only elected governments have the legitimacy to decide what fiscal risks should be borne by citizens.

WSJ: Rock Star Draghi Needs a New Song for Europe

Regardless of how effective the filters might be, the idea that the only thing standing between a functional GPS system and a constellation of space-borne paperweights is a private company's privately-developed, privately-operated filtering equipment... but then again, we love LTE.

ENGADGET: US Air Force raises concerns over LightSquared's LTE network messing with GPS

However, only 35 million people in India file tax returns, and any tax increases are borne by the same small set of individuals.

WSJ: India Plans to Impose a New Tax on the Rich