Wind up your laptop : with a hand crank it is possible to generate 35 to 60 watts, on a bike this sustained power capacity rises to 100 or 150 watts
Computing without electricity : fast and complicated calculations are a product of fossil fuels
Bring back the horses : replacing tractors with real horse power could be the revolution that agriculture needs
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Download, print, fold, paste : the best cut-outs on the internet
Life before television : the stereoscope, the panorama, the magic lantern and the peepshow
Tiles as a substitute for steel : the art of timbrel vaulting allowed for structures that today no architect would dare to build without steel reinforcements
The age of speed : how to reduce global fuel consumption by 75 percent
A world without trucks : underground freight networks
Why the electric car has no (wireless) future
The right to 35 mobiles : the energy consumption of the mobile phone network
Faster internet is impossible : internet users continually need faster connections to surf the web at the same speed
Satellite navigation in the 18th century : who needs GPS?
Green, slow air cargo : air freight could become the most eco-friendly option if speed is reduced
Ecotech from the 1940s : if we really want more energy efficient cars, the Citroën 2CV shows us that we need not more, but less technology
The return of the sailing ship : considering the wind as an extra source of power, the fuel use of cargo ships can be reduced substantially
The ugly side of solar panels : how much energy does it take to produce a solar panel?
Nuclear reactors, but no fuel : already in 10 to 15 years time, there will be a severe shortage of uranium
Why bottled water is good for the environment : water drinkers should be praised instead of criticised
Life without airplanes : from London to New York in 3 days and 12 hours
Is ecotech the new asbestos? What will remain of greentech, cleantech and ecotech if nanotechnology turns out to be harmful for humans and the environment?
The pinhole camera : build a pinhole camera, turn your bedroom into a camera obscura and rediscover photography
Leave the algae alone : while the first generation of biofuels is wreaking havoc on the environment and the food markets, the second generation is set to make things even worse
Email in the 18th century : the surprising speed of the optical telegraph
Heat your house with car tyres and earth : build an earthship
Where is the second hand market for downloads?
The digital oubliette : chances are slim your children will be able to enjoy the digital photo album when they grow up
Viva Las Vegas : LEDs will raise energy consumption, not lower it
Cars on hot air : following the hype on hydrogen - meet the car on compressed air
Planes on wheels : how eco-friendly is a high speed train?
Lego for Big Boys : habitable shipping containers
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