energy efficiency

Microsoft’s Vista boasts energy-saving features, but does that mean it’s eco-friendly?

Most of the chatter about Vista, Microsoft’s new operating system, centers on whether the techies in Redmond have outsmarted the hackers this time around. But might the system also slow destruction of the environmental variety? Microsoft is touting Vista’s new energy-saving features, even as critics are pointing out that the system has some eco-downsides as […]

Small is beautiful.

Here is a fun article from The Green Wombat retelling the "solar-to-hydrogen" car story for the millionth time. I read stories like this in Popular Mechanics decades ago. The article talks about using solar panels to store sunlight as hydrogen to burn in internal-combustion-powered cars. Australia has a lot of sunlight and summers can be hot. It would be far more efficient to use that sunlight to power swamp coolers to air-condition homes than to throw 90% of that solar energy away converting it to hydrogen and then burning it in a 30% efficient internal combustion engine. Passing hydrogen through a fuel cell to power an electric car or light a home would also be a lot more efficient.

Umbra on insulation

Dear Umbra, I recently discovered that our attic is not insulated. While I live in the fairly warm climate of San Diego, we’ve been hit by a cold spell the last few weeks and I’ve cranked on the heater. I’d really like to insulate my home and was wondering what is the most planet-friendly method […]

Watch

The Energy Star Alliance is running a public service announcement profiling a fictional family powering their house with static electricity.

It's a pretty funny commercial; I wish I knew the ad firm that did it.

Lines that are bright, how we love them

Bill McKibben’s Step It Up 2007 campaign (read his dispatches) is trying to rally a bunch of simultaneous protests pushing a single goal: reducing greenhouse-gas emissions by 80% by 2050. This approach — picking a goal rather than supporting specific legislation — is known as bright lining, and it’s something you’re going to hear a […]

Umbra on which wood to burn

Dear Umbra, I live in Maine, land of many loggers. My home is heated by an oil furnace, and I try to keep the temps down with thermostat timers to use as little oil as possible. I supplement my heat with a wood stove, as many Mainers do, and in my travels I have noticed […]

Wal-Mart pushes CFLs

Wal-Mart has has started a new campaign to push compact fluorescent light bulbs in their massive retail stores, according to an article published in the New York Times yesterday. Though only a reported 6 percent of homes use CFLs currently, Wal-Mart hopes to sell 100 million of the bulbs each year by 2008. “The environment […]

Electric bike triumphs and travails

Rode my bike to jury duty last Wednesday. It was pouring rain and the winds were gusting into the 50s. I had my trailer hitched up because I was hauling a laptop, magazines, and a battery charger with me. I don't think I could have done this without the electric motor.

However, at one point, a gust -- accelerated by the venturi effect of two skyscrapers -- stopped me cold. I jumped off and cowered in a nook where I found another guy hiding with the remains of his umbrella. I managed to drag, not ride, my bike the last block in a veritable deluge.

Read and be dazzled by the techno-futurism

David asked contributors for end-of-year lists. Since I normally focus on conservative assumptions, I thought I'd use it as an excuse to look at future breakthroughs and cost improvements.

I was going to weasel by calling these "possibilities," but instead I decided to use the time-tested technique of public psychics: I'll call them predictions, crow over any that come true, and pretend the rest never happened.

1. Power storage that will make electric cars cheaper than gasoline cars.

Ultracapacitors, various lithium systems, lead carbon foam (PDF), and aluminum are among the candidates. The first storage device with a price per kWh capacity of $200 or less, mass-to-power ratio as good or better than LiOn, and ability to retain 75% or more of capacity after 1,000 cycles in real world driving temperatures and conditions wins.