However, a spokesperson for Enron told the BBC that the average price of power per unit sold to the state government in the last year came to five Rupees and the cost will come down further once the Dabhol Power Co becomes a fully gas-based plant.

BBC: India casts doubt on Enron project

But the sober message about wind and solar applies to all renewables: All renewables, much as I love them, deliver only a small power per unit area, so if we want renewable facilities to supply power on a scale at all comparable to our consumption, those facilities must be big.

CNN: Commentary: Let's get real about alternative energy

And the logic works with servers as well as storage, as each device category continues to decrease in size, improve in capacity and performance, and reduce its power consumption per unit of work with each new generation.

FORBES: The Case for the Infinite Data Center

Operating with a voltage of 1.35V, according to Samsung tests it provides an average 70% power savings (per unit density) over a 50nm class equivalent, 1.5V DDR3-based RDIMM.

ENGADGET: Samsung bringing 85-inch ultra high definition TV to CES HD

The solar mission in its first phase focused on areas already connected to the grid and had a pricing system that bundled four units of thermal electricity with one unit of solar-based power, which reduced the average per-unit cost of solar electricity.

WSJ: India Plans Subsidies to Boost Solar-Power Sector

Looking at the numbers, however, nuclear power has resulted in far fewer accidental deaths per unit of energy than other major forms of power generation.

FORBES: What Are The Most Important Things To Know/Understand About Nuclear Energy?

The 316hp Hummer weighs twice as much per unit of power.

FORBES: Magazine Article

Those gains take two forms: less electricity consumption and a lower cost per unit of processing power.

FORBES: Magazine Article