Green Options

If you are thinking about going vegetarian, here is a list of things that should help you to actually do it,… and to stick to it once you’ve started.

Open any pregnancy or baby book, and you’ll find that list: the baby essentials, the things you absolutely cannot live without.  While many accessories are easily recognized as frivolous, certain items are truly indispensable: the basic necessities for life with a baby.

Or are they?

In this weekly series, we’ll be looking at several baby essentials that really aren’t.  They may be useful in certain situations, but if money or space is tight, or if you’re just looking to simplify and reduce consumerism and waste, here’s how to get along just fine without these so-called “essentials.“

In Part 1, we questioned the crib.   Part 2 bemoaned the bucket.  Part 3 scrutinized the stroller.  Part 4 ditched the diapers.  Part 5 scrubbed the tub.  This week, let’s bust the brain boosters!

Malcolm McCulloch, an electrical engineer at Oxford, has completed a prototype of a refrigerator designed by Albert Einstein.  This refrigerator does not use Freon, a toxic greenhouse gas worse than carbon dioxide, or electricity. The Einstein fridge was patented in 1930, uses pressurized gases (ammonia, butane, and water) to keep food cool, and contains no moving parts.

Via:  The Guardian

Albert Einstein is probably most remembered by the public for his General Theory of Relativity, but how many remember his 1930 invention of a refrigerator that used no electricity?  I wasn’t there when it was introduced, but I knew several people who had one, and they weren’t all that happy with it, primarily because it wasn’t that efficient.

The idea was great, it operated without electricity, using ammonia, butane and water.  The principle being that water boils at a much lower temperature at high altitudes where air pressure is lower than it does when you’re at sea level, where air pressure is higher.

Malcom McCulloch, an electrical engineer at Oxford University in the U.K., is leading a team in a three year project to produce appliances that can be used in places without electricity.  Or, for that matter, places with electricity, why not?.  That’s when McCulloch latched on to Einstein’s fridge idea.

Einstein’s concept, shown in the image above, works thusly.  At one side is the evaporator, a flask that contains butane. “If you introduce a new vapor above the butane, the liquid boiling temperature decreases and, as it boils off, it takes energy from the surroundings to do so,’ says McCulloch. ‘That’s what makes it cold.”