Serious as the problem seems, we can come up with some measurestodeal with it. First of all, the authorities should adopt thepolicyof “sustainable development”, and laws concerningenvironmentalprotection should be put into effect and enforcedstrictly just asour government has been doing.来源：www.exam
What s more, every citizen should realize the seriousness oftheproblem and make concerted efforts to protect our environment.Inaddition, planting trees helps improve and beautifytheenvironment.