There is no doubt that the government is the agency that should play the leading roles in solving the environmental problems. To begin with, with the power to collect taxes from individual citizens and private companies, the government have the financial resources that are necessary to deal with environmental issues. In addition, the government may formulate policies to provide incentives for the companies and individuals to reduce the amount of pollution caused by their activities. Finally, the government is the only institution that may enact laws related to environmental problems.
On the other hand, without the cooperation and participation of individual citizens and private companies, the government's efforts to protect the environment would not be effective. For example, the government may launch a campaign to educate the public about the desirability of driving compact cars for reducing the air pollution. The campaign would make little difference if the individuals pay little attention to the information or do not care about the environment at all. Nor would the government's goal be achieved if the car manufacturers do not produce more compact cars for the market. In other words, the government alone cannot solve the problem of environment. It takes the collaborative efforts from individual and corporate citizens to improve the situation.
In conclusion, I agree that the government should take the responsibility to lead the society in addressing the problems of environmental pollution as it has the power and resources necessary to do so. Nonetheless, individual citizens and private companies have to be engaged if the government is to accomplish anything.