Light Cue 23

Solar Sunday is my weekly roundup of renewable energy and energy efficiency news from around the web.

Greening Shanghai’s Skyline

Recently Gensler broke ground on a soaring sustainably skyscraper that is set to become the tallest tower in China. The slender, elegantly spiraling Shanghai Tower will rise 632 meters, making it the latest super-tall to spring up in China’s rapidly developing Luijiazui Finance and Trade Zone. A beacon for a more sustainable future, the skyscraper will feature a high-performance façade that shelters no fewer than nine sky gardens, a rainwater recycling system, and a series of wind turbines perched beneath its parapet.

Climate Change Makes Buildings Go Green

For buildings the future is bright – bright green, that is. New research into how stone facades will be altered by changes in the atmosphere suggests that the days of smutty grey and black buildings are gone.

The coming century will see iconic limestone structures like the Empire State Building, the Pentagon, and the gothic cathedrals of Europe and the US turn yellow, reddish-brown, and even green with lichen and moss.

Cities will become more colourful as pollution patterns change and wind-swept rain washes away the black coal soot typical of the 20th century. What’s more, legal requirements to use clean fuels are likely to mean lichens and mosses will grow more easily, turning buildings green in parts.

Travel The World In A Solar Car

he first solar-powered car to travel around the world ended its journey at the U.N. climate talks Thursday, arriving with the message that clean technologies are available now to stop global warming.

The small two-seater, hauling a trailer of solar cells and carrying chief U.N. climate official Yvo de Boer, glided up to a building in Poznan, Poland, where delegates from some 190 nations are working toward a new treaty to control climate change.

Boifuels Solve Global Warming Twice

Converting agricultural land to perennial grasses, such as Miscanthus, has a beneficial effect on soil carbon.

Converting forests or fields to biofuel crops can increase or decrease greenhouse gas emissions, depending on where – and which – biofuel crops are used, University of Illinois researchers report this month.
The researchers analyzed data from dozens of studies to determine how planting new biofuel crops can influence the carbon content of the soil. Their findings appear this month in the journal Global Change Biology Bioenergy.

Plants use the sun’s energy to convert carbon dioxide from the atmosphere into the organic carbon that makes up leaves, stems and other plant parts. As plants decay, this carbon goes into the soil. Organic carbon is an important component of soil health and also influences atmospheric carbon dioxide levels. Whenever the soil is disturbed, as occurs when land is plowed or cleared of vegetation, some of this carbon returns to the atmosphere in the form of carbon dioxide.

Hydrogen Goes Soalr

Scientists have found that a polymer material is an excellent catalyst in a process to produce hydrogen fuel using sunlight and water. The material meets the basic requirements for an ideal catalyst — including being abundant, easy to work with, and non-toxic — and could help this “green” alternative-energy production method become mainstream.