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As a substantial solution to carbon dioxide caused climate change, on sufficient scale to make a difference:
[6](517 kPa = 75 lb/in2) http://en.wikipedia.org/wiki/Carbon_dioxide
[8] U.S. National Institute for Occupational Safety and Health
In February 2023 we joined an organised tour to Sri Lanka.
Beginning in the capital Colombo, on the west coast, our bus travelled anticlockwise, in a loop, initially along the coast; then up into the highlands; then north, as far as Sigiriya; before returning southwest to Colombo.
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He was someone I once knew, or so I thought. One of those familiar faces I thought I should be able to place.
What was he to me? An ex-colleague, the friend of a friend, someone from school? In appearance he's a more handsome version of me, around the same height and colouring. Possibly slimmer, it’s hard to tell sitting. Maybe younger? But not young enough to be one of my children’s friends. I just couldn’t remember.
With the invention of the first practical steam engines at the turn of the seventeenth century, and mechanical energy’s increasing utility to replace the physical labour of humans and animals, human civilisation took a new turn.
Now when a contemporary human catches public transport to work; drives the car to socialise with friends or family; washes and dries their clothes or the dishes; cooks their food; mows their lawn; uses a power tool; phones a friend or associate; or makes almost anything; they use power once provided by slaves, servants or animals.