CITY PARK CLEAN-UP
In my school,we have organized a program
to clean up public parks in the city.
Every month,volunteers meet at a park
and pick up the trash
and generally clean up the park.
So far we have visited three parks,
and we're going to visit more next month.
CAR POOLS
A lot of parents drive the children to school.
This increases air pollution.
We've recently organized car pools.
Students have formed groups and their parents
take turns driving them to school.
This way,we have reduced the number of cars
coming to school each day.
Instead of four cars,there is one.
n. 污染,污染物