"We are proud C-MAX Energi is the first plug-in hybrid that can deliver a 550-mile overall range and more than 20 miles of electric range as it gives customers great flexibility to commute to work, then take off for a road trip while passing many gas stations along the way, " says Davis.

ENGADGET: Ford's 2013 C-Max Energi rolls out 95 MPGe, arrives later this fall

Like Belarus, Ukraine was forced to start paying more for its Russian gas in 2006, but not before Gazprom reduced its supplies, leading to a knock-on reduction in gas passing through the country to western Europe.

BBC: NEWS | Business | Gazprom may cut gas to Ukraine

Post-combustion, CO2 is removed from flue gas by passing it through a liquid amine which dissolves the CO2.

FORBES: Carbon Capture And Storage: Yea Or Nay?

Removing the subsidy and passing on the cost of gas to consumers was necessary but unpopular.

ECONOMIST: Ukraine and Russia

If firms are passing up easy opportunities to reduce greenhouse-gas emissions by re-using waste, then governments have set the price of emissions too low.

ECONOMIST: Talking rubbish

This can be done by heating the gas (a thermal plasma) or passing an electric current through it (a non-thermal plasma).

ECONOMIST: Diesel engines

With each passing day, and each subsequent addition to the cent column at the local gas station, I have watched the same old debates unfold among the same old talking heads on television.

FORBES: Is America Too Near-Sighted When It Comes To Gas Prices?

PowerBox Concept hybrid, for example, shown at the L.A. show, looks a lot like a standard sports utility vehicle (SUV) but combines a supercharged V-6 engine that runs on compressed natural gas and an electric motor that provides added power for acceleration and passing.

FORBES: The Hybrids Are Coming