how can government protect the environment?list two things

The methods that the government can protect the environment:
．The government can build more green areas to provide more green area.
．The government can make laws to make the society use less plastic bag.
．The government can make some activities (e.g.無膠袋日）to make people use less plastic bag(make people interests at environmental protection).
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2008-01-21 21:00:21 補充：
＜驚你唔明，特別整左中文版：＞　政府可以為環保做的事：．政府可以建造更多綠色地帶（例如：公園）去令空氣更清新。．政府可以立法去令社會減少使用膠袋，警戒市民。└政府也可以舉辦活動（例如：無膠袋日）去令市民減少使用膠袋（同上）＜除了立法外，舉辦活動也是一個好方法，活動能令人們更關注環保＞ｐｓ：第２同第３點是有關連的！希望幫到你～！

好勁 ! 無奈 !

Government can do the following things to protect the environment :

The government can call the people to use less platic bags.
The government can call the scientists to make more inventions to protect the environment
The above is the two things to protect the environment .
(only two things ! )