绿色食品指的是 ( )
A:绿颜色的食品
B:经济价值高的营养食品
C:含有叶绿素的食品
D:安全、无公害的营养食品
— I can't stand (忍受) the air pollution in this city any more. It is getting more terrible.
— ________. We've never had so many factories before.