March 6 (Reuters) - Car industry executives are gathering at the Geneva auto show, facing a tougher task to meet EU emissions regulations due to a plunge in diesel vehicle sales and worrying about a potential trade war with the United States.
> Diesel collapse gives automakers carbon headache
> VW ponders trucks IPO amid efficiency push - CEO
> Ford calls for Brexit clarity for investment
> Fiat Chrysler to spin-off Magneti Marelli
> Trump trade threats alarm German carmakers (Compiled by Mark Potter)