Alternative Energy Technology

Consolidating pictures, videos, e-mails and documents on remote servers saves more energy than keeping them on personal computers

A new survey reveals that trash from our activities on land litters the bottom of the ocean, from shallow to deep. David Biello reports

Lots--but there is still room for improvement

Which is more energy-efficient--central air or window units?

The solid battery could also prove cheaper than current lithium-ion technology once developed

Cities become a key proving ground for commercial energy storage technologies

An idled program for vehicles driven by fuel cells is gaining new impetus from new programs at the U.S. Department of Energy

Consumers do end up using more energy when energy-using technology gets more efficient, but these rebound effects are minimal, experts say

The owners of power plants that burn coal are playing high-stakes poker as they decide whether to install expensive pollution controls or shut down

Fracking for natural gas doesn’t have to be an environmental disaster, says a new report

Although capture technologies show promise, pulling CO2 out of the air is unlikely to reduce greenhouse gas concentrations soon

Although Brazil’s energy-hungry economic boom has driven the nation to tap the Amazon’s vast hydroelectric potential, the resulting deforestation accompanying its dam projects has reduced the available waterpower