The production of chlorofluorocarbons are being phased out, which has had a positive effect on the stabilization of the ozone layer.

The only  virus we know of that is teratogenic is MersCoV.

Women are more likely to die in automobile crashes than men.

A number of studies, including the study of six cities, suggest that the largest particles are the most dangerous because they can invade the body’s natural defenses and penetrate deep into the lungs becoming a chronic source of irritation.

Legal disposal of hazardous wastes is expensive and no one knows how much illegal “midnight dumping” may actually occur.

All of these are types of epidemiologic studies, except

US Medical costs are substantially lsess than the cost of countries with socialized medicine.

Which of these are licensed by the  state?

The leading causes of death in the US are

Which is true about the role of the federal government in ensuring a clean environment?