In notebook computers, Lenovo's X300 only made third place with 4.68 points, behind the Toshiba Portege R600 at 5.57 points and the Hewlett-Packard Elitebook 2530p, which scored 5.48.

In the television category, the top-scoring models were only available in Japan. Sharp's LC-52GX5 scored 5.92 out of 10, while Sony's KDL-32JE1 scored 5.84. The next-best, Panasonic's TH-42PZ800U, scored only 4.96.

Nokia's 6210 Navigator was the greenest smartphone tested by Greenpeace, scoring 5.2 out of 10, ahead of Sony Ericsson Mobile Communication's G900 with 4.8. Apple declined to take part in the study, so Greenpeace can't tell us how the iPhone 3G would have rated.

Among other mobile phones, Samsung Electronics' SGH-F268 scored 5.45, narrowly beating Motorola's RAZR V9.

That Motorola phone scored no points for recyclability or the use of recycled materials -- but the company may be able to pick up a few points in next year's tests, as on Wednesday at CES it introduced a mobile phone with a case made entirely of recycled plastics.

In general, the consumer electronics industry is far better at making green claims than green products, prompting skepticism on the part of consumers. Another survey unveiled at CES, conducted by the Consumer Electronics Association, found that 65 percent of consumers think manufacturers overstate their green credentials, while 40 percent of them are confused by manufacturers' claims.