Pollution
Drops
Screen 1 of 2
 
As
countries
go into
lock down
 
because
of
 
the
virus,
 
there
have been
large
drops
 
in
pollution
 
levels.
China
 
and
northern
Italy
have
recorded
large
falls
 
in
nitrogen
 
dioxide
 
-
 
a
 
serious
air
pollutant.