Have you seen what they're doing in America with their scrappage scheme? The engine has to be killed by means of sodium silicate, ie. liquid glass which turns solid with engine heat.
You can't tell me that killing off a clean Volvo like this one is "green". The idiots that think this is progress should be hung from a lamp post by their testicles.
The prescribed and approved method of disabling a car according to law involves replacing the engine's oil with sodium silicate, more commonly known as liquid glass. When the car is run with a mixture of water and sodium silicate the liquid quickly evaporates and the solids are left behind, causing most of the oiled surfaces to seize and break.
As you can see in the video above, the results are fairly horrific. You can actually hear this car scream. In fact, if you watch all the way, you'll see it spout up its last bit of oil before it breathes its last breath. WARNING: this is only to be instructive and educational, do not try and do this before you turn in your car.