Based on 4a, ex.2

Fill in: store, release, harm, decompose, replace, reuse, save, wrap, encourage, swap, waste in the correct form.

Some people in my class [ ]a lot of valuable resources that are difficult to [ ]. For example, some classmates always [ ]their packed lunches in silver paper which cannot be [ ]. Silver paper [ ]nature when it's [ ]into the environment because it [ ]very slowly. There are other, more environmentally friendly ways to [ ]food, and perhaps schools need to [ ]students to eliminate waste. As there are so many ways to protect the environment, people should [ ]ideas on their favourite ways. That way, we can [ ]the Earth.