Visualization of narrower problems

Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants. Although environmental pollution can be caused by natural events, the word pollution generally implies that the contaminants have an anthropogenic source – that is, a source created by human activities. Pollution is often classed as point source or nonpoint source pollution. In 2015, pollution killed nine million people worldwide (one in six deaths). This remained unchanged in 2019, with little real progress against pollution being identifiable. Air pollution accounted for ¾ of these earlier deaths.

Major forms of pollution include air pollution, light pollution, litter, noise pollution, plastic pollution, soil contamination, radioactive contamination, thermal pollution, visual pollution, and water pollution.

Source: Wikipedia

Until the 16th century, the verb 'to pollute' and the noun 'pollution' were used mainly in relation to morals and religion, thus pollution was defined as ceremonial impurity or defilement, or as profanation of some thing or place held to be sacred.
The term pollution is generally used to describe the presence of chemical substances produced by man's activities but not to describe the natural existence of even higher levels of the same substance. Thus, if a factory discharges lead into a river, even if it is diluted down to harmless levels, this is considered to pollute the river; but the lead naturally leached from rocks, even yielding high levels which can be dangerous to fish, is not considered to be a pollutant. Such loose usage of the term 'pollution' is biased and the word should be employed only when damage occurs.
(B) Basic universal problems