Built from a box fan, medium-density fiberboard, lexan and aluminum, the tunnel increases airspeed by about 240 percent and cools its contents with a brisk 9 mph breeze.

ENGADGET: Wind tunnel PC case pushes the air cooling envelope, does its thing for cancer research

Once sidled up to the building, a crew uses a scissor lift to unload giant enclosures made of Lexan and aluminum, dubbed Universal Load Devices (ULDs), which can weigh up to two tons each.

ENGADGET: Inside UPS' Worldport: How a shipping titan moves 2,000 packages every 17 seconds

The company identified 17 products that met its standard of providing "significant and measurable environmental performance advantages, " including a Lexan film that replaces conventional paint, Harmony water-conserving washing machines, the new fuel-efficient GEnx jet engine and GE's Evolution locomotive, a 208-ton, 4, 400hp workhorse that burns 3% less fuel and puts out 40% less pollution than its immediate predecessor.

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