What is sustainability – we need to use energy per person not energy per floor area for houses

When the problem becomes harder and the number of solutions are multiple, the possible answers become more emotive. In a recent discussion about achieving zero waste in the office the topic of alternatives to throw away coffee cups came up, the discussion became very emotive as the some of the possible answers affected our lifestyles. […]

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How to be green – Ceiling Fan versus Airconditioning

I got asked recently whether running ceiling fans all night consumed more energy than running an airconditioning unit at night. So here are the calculations. Lets take a three bedroom house, assume that all three bedrooms will either have the ceiling fans or airconditioning on all night.

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