Diseases, Conditions, Syndromes

Mask use by Americans now tops 90%, poll finds

(HealthDay)—Here's good news for public health officials who've been hammering home the need to wear face masks: Your messages have been getting through.

Diseases, Conditions, Syndromes

Most Americans wear masks, but myths linger: poll

(HealthDay)—Americans are generally well-versed about the use of masks to prevent the spread of COVID-19, although knowledge gaps about face coverings persist, a new HealthDay/Harris Poll reveals.

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Pollution

Pollution is the introduction of contaminants into a natural environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms. Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the elements of pollution, can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution. The Blacksmith Institute issues an annual list of the world's worst polluted places. In the 2007 issues the ten top nominees are located in Azerbaijan, China, India, Peru, Russia, Ukraine and Zambia.

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