People infected with the AIDS virus are more susceptible to tuberculosis, and this further reduces their chances of survival.

Premature deaths and disease caused by a polluted environment is the most pressing problem in the world today, says a WHO report prepared for the Earth Summit

Research in atmospheric sciences is booming because of the impending threat to4he world's climate. Every month there is a new study showing new sources of greenhouse gases rages that are capable of producing global warming or disputing earlier