The study of Earth's atmosphere and its processes is called atmospheric science or aerology.

Modern smog does not usually come from coal but from vehicular and industrial emissions that are acted on in the atmosphere by ultraviolet light from the sun to form secondary pollutants that also combine with the primary emissions to form photochemical smog.

Oxidation of SO₂, usually in the presence of a catalyst such as NO₂, forms H₂SO₄ , and thus acid rain. This is one of the causes for concern over the environmental impact of the use of these fuels as power sources.

Grapevine is used by management to spread the information that either can not be shared officially or want to test the waters.

kurtosis is any measure of the peakedness of the probability distribution of a real-valued random variable. In a similar way to the concept of skewness, kurtosis is a descriptor of the shape of a probability distribution and, just as for skewness, there are different ways of quantifying it for a theoretical distribution and corresponding ways of estimating it from a sample from a population.

C hlorofluorocarbons (CFCs) are 'harmful to the ozone layer. They are emitted from products currently banned from use.

A low standard deviation indicates that the data points tend to be very close to the mean (also called expected value); a high standard deviation indicates that the data points are spread out over a large range of values.

Semiotics, also called semiotic studies and including (in the Saussurean tradition) semiology, is the study of signs and sign processes (semiosis), indication, designation, likeness, analogy, metaphor, symbolism, signification, and communication. Semiotics is closely related to the field of linguistics, which, for its part, studies the structure and meaning of language more specifically.

One of two or more words that have the same spelling but differ in origin, meaning, and sometimes pronunciation, such as fair (pleasing in appearance) and fair (market) or wind (wnd) and wind (wnd).

Empirical research relies on experience or observation alone, often without due regard for system and theory.

Ex post facto research for descriptive research studies.The main characteristic of this method is that the researcher has no control over the variables; he can only report what has happened or what is happening. Most ex post facto research projects are used for descriptive studies in which the researcher seeks to measure such items as, for example, frequency of shopping, preferences of people, or similar data.

Operations research is an example of decision oriented research since it is a scientific method of providing executive departments with a quantitative basis for decisions regarding operations under their control.

Deliberate sampling is also known as purposive or non-probability sampling. This sampling method involves purposive or deliberate selection of particular units of the universe for constituting a sample which represents the universe.

Rogue waves (also known as freak waves, monster waves, killer waves, extreme waves, and abnormal waves) are relatively large and spontaneous ocean surface waves that occur far out at sea, and are a threat even to large ships and ocean liners.

Descriptive research, is used to describe characteristics of a population or phenomenon being studied. It does not answer questions about how/when/why the characteristics occurred. Rather it addresses the what question (What are the characteristics of the population or situation being studied?) The characteristics used to describe the situation or population are usually some kind of categorical scheme also known as descriptive categories.