change sulphur-rich black oil (mazoot) by less polluting oil or gas, Control emissions from Lilo oil refinery and various small constructed materials' plants and shops (mostly asphalt shops) As it is well known, green areas and parks can improve urban air quality by absorbing pollutants and releasing oxygen.
(it; is; well known, green areas and parks can improve urban air quality by absorbing pollutants and releasing oxygen)
it
is
well known, green areas and parks can improve urban air quality by absorbing pollutants and releasing oxygen