The project aims to establish cell-phone based carbon micro-credit systems, using a simple message service to allow families to monetize the carbon offsets they produce.

WSJ: Unlocking Africa's Energy Potential

Current techniques aren't exactly cheap, but researchers from Stanford University think they've made a bit of a breakthrough by producing a relatively inexpensive photovoltaic cell using nothing but carbon.

ENGADGET: Stanford researchers create 'world's first' all-carbon solar cell, do it on the cheap

Siemens and Shell, for example, have just announced a new fuel-cell technology for oil rigs that will capture emissions of carbon dioxide and methane, generate power from them cleanly, and sequester the exhaust.

ECONOMIST: Emissions

Furthermore, the company is involved in such a range of energy technologies (including dirty coal plants, nuclear generators, natural-gas turbines and wind) that it does not need carbon regulations in the way, say, a narrowly focused fuel-cell or solar-cell maker might.

ECONOMIST: The greening of General Electric

The carbon-fibre battery monocoque is, in addition, conceived as a "zero intrusion cell" in order to meet the very highest expectations in terms of crash safety.

ENGADGET: Visualized: Mercedes-Benz SLS AMG E-Cell bares all

The weight advantages achieved through the carbon-fibre battery monocoque are reflected in the agility of the SLS AMG E-CELL and, in conjunction with the highly innovative wheel-selective four-wheel drive system, ensure true driving enjoyment.

ENGADGET: Visualized: Mercedes-Benz SLS AMG E-Cell bares all

So, a hydrogen fuel-cell car even running ... on hydrogen derived from natural gas cuts that carbon emission by 60%.

FORBES: Magazine Article

Researchers in the solar cell industry have known for a while that one potential avenue for improving solar cells is the use of carbon nanotubes.

FORBES: A More Efficient Solar Cell--Built By A Virus