You're calling me a twat eh?
I was required to get a company car for my work. I waited until I was 30 before getting my driver's licence, and before that always traveled by public transport and (folding)bike. So right there I've been pretty environmentally friendly.
Of the cars that I could lease, the Prius is by far the least unfriendly to the environment. Of all the cars my colleagues have leased, ditto. It's not just the decent mileage (I always manage 1:20 over the period of 40-43 liters), except when it's really cold out when combined with short trips - I so far only needed it for about 15.000km last year, taking the trains whenever possible and financially more appropriate - which is often, as you can work in the train). That article on the BMW-5 series you quoted, well, we can discuss it if you want, but even if it was correct (which it isn't), I couldn't afford that car. Heck, a 1-series is already far more expensive to lease.
The Prius beats most cars both on the whole process from production to recycling, and what comes out of the exhaust. The latter is relevant to me - I live in Maastricht, a city with a couple of streets in the top ten most fine-dust polluted streets in the Netherlands, and it's a pleasant feeling that I don't contribute to that (really not, the Prius has zero emission of fine-dust particles, extremely low on most of the other stuff, including the obvious CO2 emissions which are now rewarded through taxes)
Apart from all these things, it's also an extremely pleasant car to drive, being zippy enough (no shifting together with a combined 115hp), very silent (you mostly listen to other cars when you're standing still), roomy enough to bring 3 colleagues along comfortably (we always car-pool whenever we go somewhere in a larger group) and in our overcrowded traffic no shifting is also very pleasant.
If all this makes me a twat in your eyes, then fine. But then I wish there were more twats in the world.