Why others not following it?

Once operational, the wind turbines will deliver approximately 11-15% of the energy needs of the building, or 1100 to 1300 megawatt-hours per year — enough to provide light in 300 homes for over a year.
Just last month we witnessed a gigantic skyscraper / solar tower hybrid that generates a whopping 390-kilowatts of energy, but even that looks like child’s play compared to the 40-story solar power plant that resides in Spain. The expansive system consists of a towering concrete building, a field of 600 (and growing) sun-tracking mirrors that are each 120-square meters in size, and a receiver that converts concentrated solar energy from the heliostats into steam that eventually drives the turbines. Currently, only one field of mirrors is up and running, but even that produces enough power to energize 6,000 homes, and the creators are hoping to see the entire population of Seville (600,000 folks) taken care of solely from sunlight. So if you’re eager to see what’s likely the greenest solar power plant currently operating, be sure to slip on some shades, tag the read link, and peep the video.

Country like India and other big fast rowing countries desparetely need more and more power and drain its hard earned money for the power generation instead of food, shelter, communication etc. People now must think the alternate way for their need of power so that at least they can create their power by alternate sources like wind, solar etc.