We're digging the range of stuff in Australia-based Tom Fereday's book. First up is his Sakana Light, "an LED powered ceiling light which uses fibre optic lighting in conjunction with re-cycled packaging:"

Then there's his airy Stack Chair, inspired by grocery store shopping carts, which nests horizontally to save space when not in use:

On the alternative energy front is Fereday's (patent pending) SolarStand, a rollable solar panel that unfurls and mounts to a camera tripod for instant juice:

In the "miscellaneous" section of his book we have a "rotary umbrella" concept and his killer Public Seating, which appears to use fabric on rollers that stretch out of a wall to provide seating.

Says Fereday of his own work:

One of the major considerations for all work I pursue is to understand and appropriately evaluate the environmental effect of the design outcome. Subsequently a running theme throughout many of my projects has been to use the environmental impact of a design as a positive constraint within my design process.

Check out Fereday's full book on Coroflot.