power density, Tag

Taking land for wind and solar can seriously impact the environment.

Improved power and energy densities mean utility-scale solar is less land-intensive than a decade ago.

This is a guest post by Tom Murphy. Tom is an associate professor of physics at the University of California, San Diego. This post first appeared on Tom's blog Do the Math. Batteries fail—as certainly as death and taxes....

The discussion about our energy supply is full of extremely optimistic expectations. There are many people who believe that full replacement of fossil with renewable energy sources in an extremely short time span is possible....