根据句意及首字母提示补全单词
A thousand kilograms of r_____ paper saves seventeen trees.
The tap is l_____. You can't use the water that leaks out.
They give p_____ to the classes that make the least garbage.
Environment clubs e_____ students to bring their lunches in reusable bags and dishes.
How much do you throw a_____ after lunch?
Here a_____ some things students in North America do.
People work together to make our e_____ clean.
In an environment club, people do things t_____.
In North America, many students help their schools m_____ less pollution.
The Rocky Mountains are the biggest m______ in North America.