That's what I have become. Speaking of energy efficiency and cars I'd like to post my personal quick-and-dirty efficiency-focused market review about cars due to popular demand.

We own a 2007 Renault Megane II 1.5 DCI Expression 80hp. We did some 20000 kilometers in the last 6 months and I've collected some statistics about efficiency. I'm not really happy to drive an internal combustion engine but this ~1200kg device proved to be somewhat efficient:

More than 1250 kilometers per 60-litres-tank (and still going, will probably do about 1300) is not so bad if you're patient enough to cruise around 100km/h. More than half of this was done on city traffic, which means the engine consumes 4.3lt/100kms and according to Renault its CO₂ emission is something like 117g/km and 91% of the mass can be recycled. Interior quality is not so good compared to a BMW, but it has relatively good price/performance ratio.

Small Common-rail Diesel engines are relatively efficient, but Renault-Nissan is after something better: Project Better Place. Apparently Renault will supply 100% electric cars and help build the infrastructure in Israel and Denmark to support usage of electric cars. The project is supported by the government in a usual way: reduced taxes.

If you're interested in hybrids, which I'm not really into: there's Honda Civic Sedan Hybrid. And for god's sake, please, no SUVs.

We use public transport when possible, I'll buy a bike for the summer, and we just walk when time permits. Safe and healthy, highly recommended. Human body is 9^th Symphony of the nature, the most efficient food-to-you-know-what converter ever.

Enjoy.