Here's some food for thought.

One of the trillion items unveiled at CES this week in Las Vegas was Fujitsu's corn-based PC.

Come again?

That's right. In an effort to cut down on greenhouse gas emissions, Fujitsu presents to the world its third-generation Biblo PC, 50 percent of which is made from corn-based polymers.

To be more specific, only the notebook PC's body shell is made from ears of corn; corn that's been processed into corn starch and then turned into a polymer alloy. The other half of the PC is built out of good 'ol environmentally unfriendly plastic.

So how does this help keep the world a better, cleaner place?

Well, according to Fujitsu, manufacturing with corn cuts C02 emissions by 15 percent.

What surprises me (even more than the fact that I actually want to salt and butter the damn thing) is that Fujitsu's been peddling these corn-based notebooks since 2002.

Why these partly organic machines aren't flying off the shelves might have to do with public skepticism about how durable these devices are (Fujitsu insists the structural integrity is on par with the PC's non-corn cousins), and the fact that these PCs cost $2,000. It ain't cheap being green, that's for sure.

Another green innovation comes from ZPower, which is hoping to replace all those nasty lithium-ion batteries with silver-zinc batteries, showing up in laptops as soon as this summer.

Not only are these batteries more recyclable, the company claims the capacity is 20 to 30 percent higher than that of lithium-ion laptop batteries.