How to get actually down the fleet average for the CO ₂ emissions and can still sell big cars with lucrative profit anyway? About this one already thinks intently a long time, especially in the German automobile manufacturers.

The relevant EU bodies sharpen the knife again, want to reduce the future applicable limits once again dramatically. The corresponding lobby disagrees. Meanwhile there are even serious disputes e.g. between German and French manufacturers, because the latter could be achieve more stringent limits more easily with their less luxurious vehicles.

Almost all apply electric drive more or less. Audi has thought about something else. Take a car with gas drive, nothing particularly exciting with 95 g/km CO₂. But in addition, one built an e-gas plant together with the operator of a biomethane plant on the grounds. The renewable current will used, of which we have already often there too much and the CO₂, which the existing system would give into the atmosphere.

By a method of balanced refueling possible will now being pumped at least as much methane or natural gas into the grid, as the corresponding g-tron cars consume. By the consumption of CO₂ in the production, the emissions of cars accounted to virtually zero and is credited accordingly to the manufacturer.

The work is in the Emsland region near the coast, where the need of storing electricity is probably the greatest. The federal government contributed 6 million, Audi apparently 14 million. At the moment, wind turbines are even resting despite the wind, because the current is not needed. Therefore, the method described is despite the remaining efficiency factor problems is a step in the right direction.

By the way one has thought even further. The whole procedure will more effective seen by the efficiency factor, when by small changes of the process hydrogen is produced. Provided an appropriate network of petrol stations, even fuel cells could then be operated.

After all, there is already a noteworthy natural gas filling station network and at the car hardly any restrictions. Instead of steel is used today (from inside to outside):
1. Gas-tight polyamide,
2. Carbon fiber reinforced plastic (CFRP),
3. Glass fiber reinforced plastic (GRP).

The changes to the internal combustion engine are actually marginal. Even the higher octane rating of methane/natural gas can be used already today. And if necessary, you can fill at each gas station. 08/13