Role of Light in Green Technology
Advancement of technology during past century has adversely affected the life-sustaining ecosystem of our planet by depleting natural resources and changing the global climate by carbon emission. This alarming situation has made the scientists aware of the necessity of mitigating or reversing the negative effects of human activities on environment. In the present discourse we propose to discuss various aspects of green or sustainable technology. Light or electromagnetic radiation plays a very important role in achieving green development of our economy and this forms the pivot of the present talk. In dealing with the uses of light and light-based technology on our ecosystem we must not overlook the dichotomy of light and dark. Darkness has also an important role to play in Green Technology. We propose to conclude by referring to the adverse effects of excessive, misdirected and obstructive artificial lighting, causing luminous pollution.