Lockdown eases seasonal smog – but less than expected

The Guardian | Apr 2, 2020 at 7:00 AM
  • We think of spring as the time of blossom and fresh new green growth, but it is often the most polluted time of year in western Europe.
  • In March 2014, Paris and many other French cities banned half their cars to control a spring smog.
  • During spring smogs, polluted air spreads from country to country, so it is hard for any city to completely control these episodes on its own.