Examlex
Instrumental communication involves sending messages that are a means to an end.
Ozone
A molecule made up of three oxygen atoms that occurs naturally in the Earth's stratosphere and protects life by absorbing ultraviolet radiation.
Troposphere
The troposphere is the lowest layer of Earth's atmosphere, extending from the Earth's surface up to about 8 to 15 kilometers, where most weather phenomena occur.
Human Health
The state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity.
Acid Rain
Precipitation with a lower pH than normal, caused by emissions of sulfur dioxide and nitrogen oxides from industrial processes and vehicles, which can harm ecosystems and human-made structures.
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