1. The batteries react with a carbon fibre aircraft, this causes extra sweating and makes for a less comfortable ride.
2. There has been a huge carbon fibre discovery near Oklahoma, the new mine will bring the cost way below that of Aluminium.
3. Excessive dampness (see 1), extra dehumidifiers are required compared to Aluminium.
4. If there is enough glue, Belgium will probably lead here.
5. Lego.