BBC News
France has banned domestic short-haul flights where train alternatives exist, in a bid to cut carbon emissions.
The law came into force two years after lawmakers had voted to end routes where the same journey could be made by train in under two-and-a-half hours.
The ban all but rules out air travel between Paris and cities including Nantes, Lyon and Bordeaux, while connecting flights are unaffected.
Critics have described the latest measures as "symbolic bans".
Laurent Donceel, interim head of industry group Airlines for Europe (A4E), told the AFP news agency that "banning these trips will only have minimal effects" on CO2 output.
He added that governments should instead support "real and significant solutions" to the issue.
