A．The environment pollution is mainly due to the peoples' ignorance.
B．Any one who wants to protect environment will meet lawsuits.
C．If all the goals are fulfilled, It can make sure the environment can be improved immediately.
D．The environmental health issues not only involve cities, counties ,states but also federal government.

A．Legislation and government intervention.
B．The industry's understanding and support.
C．The efforts of environmental health professionals.
D．The cooperation of ecologists, environmental activists and conservationists.