请根据下列提示用英语制作海报，呼吁人们节约用水。

　　★ 水是生命之源，无水便无生命；

　　★ 现代社会对水的需求越来越大；

　　★ 许多地方缺水，大量的水被污染；

　　★ 许多人浪费水；

　　★ 采取措施，与污染及浪费水的行为作斗争。

　　注意：词数：60左右。

　　saving water means saving ourselves!

　　★ water is the basic source of life. there would be no life without water.

　　★ more and more water is needed in the modern society.

　　★ many places are short of water; many rivers and lakes are polluted. what’s worse, many people are wasting water.

　　★ in order to protect water, let’s do something to fight against all kinds of pollution and waste of water.