one possible solution is to plant trees in local parks and forests. this way, trees absorb carbon dioxide — air becomes cleaner.
one possible solution is to encourage people to use public transport or cycle. this way, fewer cars on streets — cleaner air.
one possible solution is to plant trees in local parks and forests. this way, trees absorb carbon dioxide — air becomes cleaner.
one possible solution is to encourage people to use public transport or cycle. this way, fewer cars on streets — cleaner air.