Particulate Matter are usually referred to as the sum of or mixture of solid and liquid particles suspended in the earth’s atmosphere. These particles can be both organic and inorganic.

Particulate Matter have the ability to negatively impact the biosphere, climate and several ecosystems on the planet. Particulate Matter are one of the most common air pollutants because of its potential to infiltrate the pulmonary systems and blood streams causing damage of the permanent or fatal nature.
Man made causes :
Construction & Demolition – The infrastructure industry contributes heavily in the introduction of particulates and pollutants. Several activities in construction and demolition generate huge quantities of fine particles from several types of sources and materials such as cement, wood, plastics, ceramics etc. Additionally, massive dust particles are released into the atmosphere due to this industry and its activities.
Health Effect
Pulmonary Ailments – Fine particulates can penetrate almost all pulmonary systems unaltered and can attach the systems from the inside. This may result in discomfort and bronchial diseases.
Cardiovascular Diseases – Similar to pulmonary ailments, introduction of fine particulates in the cardiovascular systems may result in narrowing of arteries and veins. This may further lead to arrested flow and stressed cardiovascular functioning leading to several cardiovascular diseases.
Premature Deaths – Higher number of premature deaths have been recorded in localities showcasing higher concentrations of particulate matters.
Cancer – Unfiltered inhalation of particulates is directly associated with increased counts of cancerous growths within the human body.

Source:https://greensutra.in/particulate-matter/