1

1.1

roll out v. 推广，或实行

1.2

pilot v. 试行
n. 飞行员

1.3

bags for life
可重复使用的环保购物袋

2

2.1

How many times a year do the environment groups monitor plastic usage by supermarkets?
Greenpeace and another campaign group, The Environmental Investigation Agency, monitor plastic usage by the supermarkets on an annual basis - so once a year.

2.2