(see Version 1.1 of this card)
You arrive home from work one evening, only to discover your biosphere is dead. What a way to start the week! On looking back through the records, the reason is not hard to discover. A classic greenhouse-effect problem. Next time, wind down the fossil fuels a little more so your globe doesn’t cook itself to death while you’re out. Fortunately the biosphere in question is only a game, or something like a game. You have this program running on your home computer called SimEarth, which lets you model all kinds of biosphere conditions over a number of different time frames: geological, biological and sociological.* The one you think you’re getting a little obsessed with is a model of planet Earth from 1990 onwards. So this week you decide that you will set up this model every morning, selecting types and quantities of energy use and expenditure. You will come home every evening and see if your world is still running. Sometimes it is, sometimes it isn’t.
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