The division came to the recommendation after rival computer maker Dell (DELL) challenged Apple’s (AAPL) MacBook marketing, which refers, among other things, to the devices’ energy usage, packaging and recyclable components.

Dell’s complaints, according to a report published by the Bureau’s National Advertising Division, include Apple’s reference to its gold ratings by the Electronic Product Environmental Assessment Tool, or EPEAT — ratings Dell said it and other PC makers have also received.

It also pointed out four “pillars” in Apple’s MacBook ads — recyclability, reduced packaging, less toxic materials and increased energy efficiency — and claimed that “Apple must, but does not, establish superiority over all of its competitors in all four pillars to support its broad superiority claim…many competing laptops offer the same characteristics it cites as the basis of superiority (e.g., recyclability).”

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Ports on left side include a new mini-display port. The left side also features a battery indicator.

Other points : A solid-state drive option. The unit is less than 1-inch thick, .95 inches to be exact.

There are two models. The model with a 15.4-inch display comes with a 2.4 Ghz Intel Core Duo and sells for $1,999.

The second model has the same screen size and faster processors.

They go on sale today and start shipping tomorrow.

The new MacBook Pro is the most environmentally-friendly computer Apple has ever made. It’s the first Apple laptop to win an Electronic Products Environmental Assessment Tool–EPEAT–seal from the Environmental Protection Agency.

Coming up: MacBook Air.