Environment Services - New Wave of upcoming opportunity

Environmental services is becoming one India's the fastest-growing services sector, as an increasingly industrialised economy and wealthy population elevates the need for clean air and water and the recycling of scarce natural resources.
The Indian government is looking to the private sector to build and manage numerous aspects of environmental services to include waste-water treatment, hazardous waste disposal and air-quality control systems.
There are lots of foreign funds looking to invest in this sector.

Considering that approximately 70 per cent of India's cities do not have adequate waste-water treatment, the financial opportunities in this area alone are significant.

i have found a good paper on Environment Services, link to which is given below.
http://ideas.repec.org/p/ind/icrier/102.html