Here is an interesting image, the infrared image of Hong Kong Island promenade, the sum has been shining all day and the path is absorbing the sun’s energy, the walkway is warmer than its surroundings. At night, that stored energy keeps the area warm, warmer than the air temperature, a good example of the urban heat island effect.
Infra-red is accurate and very sensitive, the image even shows the edges of the manhole covers!
It is not too difficult to avoid this problem (remember white reflective roof post) choose a material with a high solar reflectance index (SRI) say 80 or above, that will reduce the energy absorbed.
Another, and some might say, purist video, illustrating the simplicity of the perfect Circular Economy (CE) this one is from EU Environmental department.
The principle is very simple, an old product is the raw materials for the new product, but not necessarily the same product. The steel content from old vehicles has been using this model for decades because steel is expensive, it can be recovered, and processed into new products. Even aircraft, trains are all stripped bare to recover that valuable steel or aluminum to make the next product. Continue reading →
Great news from Beijing, China, mark your diary, on 20 March 2017, RTHK (www.rthk.org.hk) reported that “….the last large coal-fired power plant in Beijing has suspended operations, with the city’s electricity now generated by natural gas” LINK: http://news.rthk.hk/rthk/en/component/k2/1320043-20170319.htm Meanwhile here in Asia’s World city, burning coal for power generation continues.