There is Toyota, Honda, Opel, Mitsubishi, and many other. There is no place on the road. Neglect public transport. Go for a car. There is so much of pollution.
Particulates come from diesel, from thousands of cars running on diesel engines.
Diesel is cheaper in India than petrol. Government levies no tax on it. Automobile companies have used this to their advantage. Luxury diesel cars are a rage in Delhi. Powerful and better.