I have this urge to knock on windows of idling cars to tell the drivers inside that they're polluting the air, draining our limited resources & wasting government subsidies. Somehow I've never gotten the nerves to do it.
We should learn from Vancouver where they have a 3-minute idling rule in the city. Once, I sat on an idling bus for 15 minutes while it waited for passengers in Malaysia. That would have been frowned upon if it happened in Vancouver. Some would argue that the weather here is too hot and we need air-conditioning, but that bus was so ancient, it doesn't have one.
When are we going to change?