1.I am Amy who is a student.(这是定语从句）
2 I never let thetap open as no one use water, and I aways use water recycledly,including watering flowers with the water which had been used for washing one's face and washing dishes with the water which had been used for washing vegetables.
3 I rarely use plastic-bag, for its polluting the environment.
4 It is low-carbon life that makes our lives more meaningful.
希望对你有帮助,下次你也可以自己尝试意译看,大家可以帮你修改