History of development in green technology
Main article: [wiki: renewable energy]
The history of green technology [wiki: renewable energy (history)] is not quite new. According to Alexis Madrigal, the author of “Powering the Dream: The History and Promise of Green Technology”, there have already existed a large number of windmills and solar heaters in the early 20th. Despite the fact that various green technologies have been developed and used for centuries, the history of minor technologies is quite obscure since there is a few credible record. [Alexis]
From the early 21th, there has been a large development and investment in renewable energy industry [wiki: renewable energy (Market and industry trends)] such as hydroelectricity, wind power, solar thermal, and geothermal. It is said that a “mini green bubble” have already occurred between 2005 to 2007, being terminated by the recession in 2007. [Bennett] The bubble made a drastic fluctuation in stock prices of companies with respect to green technology; for instance, the stock price of World Water & Solar technologies, which deals with solar powered water pump, once experienced a steep rise from 5 cents to $2.50 in 2007, subsequently facing a decline to 29 cents after the recession [Bennett].
Madrigal, A. (2011). Powering the dream : the history and promise of green technology. Cambridge, MA : Da Capo Press, c2011.
Bennett, J. (2010). green bubble? Entrepreneur, 38(4), 51–54.