Let the hive mind of Engadget get that for you.
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Great news. The air engine is already in use in forklifts in a warehouse in Australia. Designs for this type of engine have come from Spain, Italy, Australia and probably many other countries so I'm surprised that the first commercially produced domestic (i.e non-industrial) vehicle has come from India. I hope this is the first of many technological surprises of India.
As for pollution created by refuelling, it takes less than a couple of minutes. Check out the Wiki at http://en.wikipedia.org/wiki/Air_engine
Looks like many of the problems mentioned in the Wiki have been resolved.