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Steve Jobs promised to make Apple a greener company. With the MacBook due for a redesign, AppleInsider reports the new laptop enclosure will be crafted of aluminum and stainless steel, similar to the company's other current offerings. Thus will end almost two decades of

plastic Apple laptops spanning from the original Mac Portable released in 1989 (pictured above). New MacBooks and MacBook Pros should start shipping in the second half of 2008. Apple's industrial design cycle is typically 18-24 months, and the latest plastic MacBook was first released