Energy Bulletin
Wide-ranging current news about energy use and sustainability.
Post-Carbon Institute
Think tank researching life using less energy.
Sharon Astyk
Practical guide to running a household in a shrinking energy world.
350.org
The campaign to limit CO2 concentration in the atmosphere.
Dmitri Orlov
Hysterical and mordant look at the fragility of industrial life.
Culture Change
Other ways of living than consumerism.
Lowtech Magazine
Pretty good at debunking technical solutions to energy/pollution issues.