Here in the province of Milan it is now forbiden to drive a car that does not meet the Euro standards for emissions. Only vehicles that meet Euro 1 standard or better for petrol engines or Euro 3 or better for diesels can be driven in built up areas on Monday to Friday between 7.30 and 19.30.
My Focus TDDI is a Euro 2 diesel and despite it being in good condition and low milage for a nine year old car I've had to sell it because I live in an area covered by this local law.
Here the scrapage scheme applies to cars first registered before 1st Jan 2000 mine was registered in February 2000.

There is also financial assistance locally for owners of cars like mine, but I earn slightly too much to qualify.
So is my suddenly worthless car going to be scrapped to save us from global warming? Nope. A niche market has been formed exporting cars which can't be driven here to eastern Europe (mine's going to Bulgaria) where lots of people who couldn't afford a car will now have access to affordable second hand ones.
I now own a Focus TDCI Euro 4, the newer engine doesn't pull from low revs like the old one and generally feels a lot 'busier'. Still on the first tank full but it does look like returning about 20% better fuel consumption which is good news.
Jon