Would you like to decorating your walls with those plants ?

Green roofs help to reduce the heat island effect in towns and cities because plants absorb less heat than concrete and can also cool the air via the process of evapotranspiration. This can save energy by cutting the need for air conditioning on hot days. What's more, they reduce the risk of flooding by absorbing water and, of course, they absorb carbon dioxide.

Most existing green roofs use various species of Sedum, because the plants can survive without rain for long periods, meaning they require little maintenance.

But Tijana Blanusa, a Royal Horticultural Society researcher based at the University of Reading in the UK, wanted to know if Sedum really is the best plant for the job.

She compared a variety of plants, including a Sedum mix, lamb's ear andelephant ear, to see if differences in leaf shape and structure would make a difference to the temperature of the air above them.

She found that lamb's ear, a silvery, hairy-leafed plant, had the consistently coolest leaves over a two-year period. "Even when it is really stressed, and the leaves of other plants get a few degrees warmer than when they are watered, the lamb's ear manages to keep its leaves cooler than those that don't have hairs," she says.

What's more, when she measured the air temperature 20 centimetres above each plant, she found that on the hottest summer afternoons the air above lamb's ear was also cooler than above the other plants.

Hope this article helps you out..... ^_^


mawan tri hananto, sstp, m.si said... @ 4 April 2011 at 21:31

artikelnya mantap, salam kenal yaaaa..( calon bupati wonogiri..mudah2an xixi)

mas-aripp said... @ 21 May 2011 at 00:43

Salam kenal balik, mas calon bupati wonogiri...terimakasih telah berkunjung..hehe

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