I would like to reply to all of the points you raised.
It is perfectly affordable: It might be affordable to you, but not for everyone. A lot of people find easier to collect 1 millions Rs but find it hard affording petrol. CNG is a good fuel ALTERNATIVE for them. Just like me.
Long queues on CNG stations: I dont get stuck in long queues. ONCE a week I have to wait for 10-15 mins in queue. May be thread starter faces similar situation.
People aren't worried for the environment anymore: Are you kidding me? Yesterday a paper was being presented at my university titled 'Green Wi-Fi'. Those would be very ignorant people who dont care about environment. I do and i believe most of people i know they do as well.
In every CNG topic majority of pakwheelers are saying big NO to CNG. Guys, I CANNOT AFFORD PETROL AND I CAN AFFORD CNG. This guy needs help MOST from vitz owners who have CNG fitted or have experiences.