I always find it interesting how the wealthy countries of the world work hard to save money, when they already have a lot to spend, while poor nations waste what little they have on status symbols. Tree Hugger has a number of very interesting ideas that could be implemented in virtually every city in India to some extent or the other. Some of these ideas would not be completely clean but they would save valuable foreign-exchange in India from going to the Saudis who have more than they need.
The city of San francisco has begun a massive program to recycle locally produced organic waste into bio-fuel to run the city's 1500 buses. All of India's metros and its smaller cities like Bangalore, Hyderabad, Lucknow etc have as many people and as much waste oil as San Francisco generates and this should save a huge amount of diesel fuel from being used. Check out the link on the Tree Hugger website at: http://www.treehugger.com/files/2008/09/san-francisco-plans-waste-grease-biodiesel-facility.php
The second link that I have at the Tree Hugger website is, positively, one that focuses on a technology that is being used in India and Bangladesh and now in a much bigger way in Pakistan. The use of animal droppings (spoecifically chicken poop here) to generate power: http://www.treehugger.com/files/2008/09/dutch-biomass-plant-chicken-manure-netherlands.php
This new diet for cattle developed in the UK promises to reduce greenhouse gases and also to help cows generate more milk: http://www.treehugger.com/files/2008/09/new-cow-diet-reduces-emissions.php This is something that could be applied across the baord in South Asia as it is an easy solution that any dairy farmer could implement.
Farmers here have found that goats help redice weeds very efficiently and, of course, they help the environment by reducing the use of weed-killing chemicals. http://www.treehugger.com/files/2008/09/cattle-ranchers-want-goats.php Another solution that could be easily used across South Asia.