March 14, 2014
Authorities in Paris have taken the rare step of making public transport free for three days to reduce severe smog caused by unusually warm weather.
The French capital region and 30 other departments have been on maximum pollution alert for several days.
Landmark buildings like the Eiffel Tower were barely visible after a white fog settled over Paris.
The capital’s air quality has been one of the worst on record, French environmental agencies say.
A lack of wind, combined with cold nights followed by unseasonably warm days, has contributed to the worsening conditions.
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