A Collection of articles on climate engineering. Feel free to add or comment
Shading Earth: Delivering solar geoengineering materials to combat global warming may be feasible and affordable
Date:August 30, 2012
Source: Institute of Physics (IOP)
A cost analysis of the technologies needed to transport materials into the stratosphere to reduce the amount of sunlight hitting Earth and therefore reduce the effects of global climate change has shown that they are both feasible and affordable. The study has shown that the basic technology currently exists and could be assembled and implemented in a number of different forms for less than USD $5 billion a year.
When l read this article, the first thing l thought of was large numbers of cane toads in plague proportions introduced in Australia to solve past mistakes
Our past history of correcting our past mistakes have been diabolical
Our desire to control the climate scares me a little
‘Native to Central and South America, Cane toads were introduced to Australia from Hawaii in June 1935 by the Bureau of Sugar Experiment Stations in an attempt to control the native grey-backed cane beetle (Dermolepida albohirtum) and Frenchi beetle (Lepidiota frenchi). These beetles are native to Australia and they are detrimental to sugar cane crops, which are a major source of income for Australia. Adult cane beetles eat the crop’s leaves, but the main problem is the larvae, who feed on the roots. Adult cane beetles have a heavy exoskeleton and their eggs and larva are often buried underground, making them difficult to exterminate. Furthermore, conventional methods of pest control, such as pesticide use, would eradicate harmless species of insects as well, making it an unsatisfactory method.
The cane toads bred immediately in captivity, and by August 1935 more than 102 young toads were released in areas around Cairns, Gordonvale and Innisfail in northern Queensland. More toads were released around Ingham, Ayr, Mackay and Bundaberg. Releases were temporarily limited because of environmental concerns but resumed in other areas after September 1936. Since their release, toads have rapidly multiplied in population and now number over 200 million and have been known to spread diseases affecting local biodiversity.
Unfortunately, the introduction of the toads has not only caused large environmental detriment, but there is also no evidence that they have had an impact on the cane beetles they were introduced to predate.
The toads have steadily expanded their range through Queensland, reaching the border with New South Wales in 1978 and the Northern Territory in 1984. The toads on the western frontier of their advance have evolved larger legs; this is thought to be related to their ability to travel farther. As a consequence of their longer legs, larger bodies, and faster movement, about 10% of the leading edge cane toads have also developed arthritis. It is estimated that cane toads migrate at an average of 40 kilometres (25 mi) per year currently.’
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Thanks to ‘dave7’ from weatherzone forum for providing this linkhttp://forum.weatherzone.com.au/ubbthreads.php/topics/1244317/Re_Sun_gone_to_sleep#Post1244317