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Wednesday 19 August 2009
Barcelona gets new water supply
A desalination plant has opened near Barcelona - said to be the biggest of its type in Europe - to ease chronic water shortages.
A drought last year forced Barcelona to import drinking water by tanker. It was one of Spain's driest years on record.
The new plant at El Prat del Llobregat will provide 24% of the water consumed in the Barcelona area, officials say. It went into operation on Monday.
Two more desalination plants are being built in the Catalonia region.
The new plant near Barcelona will provide 200m litres (44m gallons) of drinking water daily for the city's 4.5 million people.
If the UK were a village of 100 people... - Features, Health & Families - The Independent
There are, according to the estimate for this month, 6,790,062,216 people in the world. It's hard enough to say the number, never mind picture those people. You could round it up to a less tongue-twisting 6.8 billion, but does that make such a frightening figure any easier to compute? When you try, do you see faces, or just more brain-frying strings of digits?
The sheer vastness of the data we gather in our attempts to understand the world around us has been challenging statisticians since the earliest censuses. The "size of Wales" approach to number-crunching is popular among headline writers; but is it helpful, for example, to imagine the global population in terms of 75,445 Wembleys, or, indeed, 2,341 Waleses? The numbers are still too big.
It's the same with the news we read and hear each day. What does it mean when we're told that unemployment has risen by 281,000? Is that a huge number? Or just a big one? The stories are about people, but it is often hard to see beyond the figures.
If the UK were a village of 100 people... - Features, Health & Families - The Independent
Top Ten Technologies for an Alternative Energy Future « EE/RE Investing
The muscle car of energy efficiency. Combined heat and power isn’t sexy… it’s just using the “waste” heat from your powerplant for some useful purpose. Like cooking your lunch on you car radiator, but using every bit of waste heat you can… Combined heat and power can use 90% of the power in your fuel source for useful work. And now you can have it in your home.
They’re tall, they’re low-tech, and they’re baseload power. They don’t pollute, and the fuel is free. What’s not to like?
8. Molten salt thermal storage
It’s cheaper to store heat than electricity, and molten salts can store a ton of BTu’s very cheaply. And concentrating solar power can produce a ton of heat… without pollution or fuel.
7. Light Emitting Diodes (LEDs)
More lumens per watt… now that’s energy efficiency.
Our energy efficient cars can make the electric grid work better.
5 & 4. Cellulosic Ethanol and Biodiesel from Algae
The two technologies that have real hope of replacing gasoline and diesel as liquid fuel for our cars… We’ll still need massive efficiency gains and Plug-in-Hybrids to reduce our total fuel use, but even with those, corn ethanol and biodiesel from traditional oil crops just can’t produce enough volume.
3. Time of Use pricing and Demand Side Management.
Sometimes the best ideas are the simplest. To make the best use of wind power, we can store power until it is needed, or we can give people incentives to use it when it is available.
Time of use pricing is also a great boon for solar, because solar energy tends to be available near times of peak demand.
Finally, time of use pricing shaves peak demand, which means that we can delay building new fossil fired generation, while renewables get cheaper by the year.
2. Terra Preta
Discovered by aboriginals in Brazil, thousands of years before Columbus, mixing carbon into unproductive soils can make them much more productive… and the carbon stays there for thousands of years. Using charcoal dust as a fertilizer not only holds the hope of a replacement for fertilizer based on fossil fuels, but it is also an easy way to sequester carbon.
1. Compact Fluorescent Lightbulbs
Where else can you get a 1000% payback with little or no risk?
Top Ten Technologies for an Alternative Energy Future « EE/RE Investing
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