I was recently quoted the figure that 1 litre of petrol is roughly equivalent to 1 week of average human male labour. This statement intrigued me so I did some pretty rough(1) calculations of my own to see if it added up.
Energy output of petrol (2) = 34 MJ
Energy cost of petrol (3) = ~ […]

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I just spent the last hour trawling through you tube watching Barack Obama speeches and interviews - it really felt like a light could be at the end of the political tunnel for the USA. Yeah it’s all very orchestrated and his references to JFK and Martin Luther King aren’t too subtle but I guess […]

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