Comment "Many are of natural origin, e.g. pollen grains, fungal spores, and volcanic dust. Others are injected into the air by human activity, e.g. ploughing of dry soil, burning of vegetation, and the burning of fossil fuels. Small particles can be harmful to health when inhaled, because they are able to penetrate deep into the lungs. Particles smaller than 25 μm in diameter are known as PM-25; these are believed to cause a number of respiratory illnesses. Particles 10μm in size, known as PM-10, are possibly even more injurious.See also:- particulate air pollution [ IATE:1354052 ]- suspended particulate matter [ IATE:824980 ], which is particulate matter that remains suspended in a liquid or gaseous medium, such as air or water.- particulate-bound metal [ IATE:3572640 ]"
Definition ensemble des poussières de tailles diverses constitutives des aérosols atmosphériques et dont une grande partie peut être imputable à l'activité humaine Reference Schayes,Guy,Docteur en sciences,et Ronneau,Claude,Docteur en chimie,Université catholique de Louvain
INTERNATIONAL RELATIONS|defence · TRANSPORT · TRANSPORT|land transport|land transport
Definition "toute unité, autre que les unités "" aérotransportées"" ,dont l'équipement est adapté au transport aérien" Reference Glossaire OTAN de termes et définitions,1984
Definition impureté de l'atmosphère se présentant sous la forme de matière solide ou liquide finement divisée, d'origine naturelle ou industrielle Reference Institut international du froid,Nouveau dictionnaire international du froid,1975
Definition transmission of an infectious disease/agent from a person who has respiratory symptoms (e.g. coughing or sneezing) by projection of aerosolised respiratory secretions and presence of the pathogen within droplet nuclei which are generally considered to be particles <5μm in diameter, can remain in the air for long periods of time and be transmitted to others over distances greater than 1 m Reference "COM-Terminology Coordination, based on: 1) Commission Implementing Decision (EU) 2018/945 of 22 June 2018 on the communicable diseases and related special health issues to be covered by epidemiological surveillance as well as relevant case definitions 2) WHO. 'Modes of transmission of the COVID-19 virus' (12.5.2020) "
Comment "Do not confuse with droplet transmission."
ENERGY|soft energy · INDUSTRY|mechanical engineering
Definition a design concept for a wind turbine that is supported in the air without a tower Reference """Airborne wind turbine"". Wikipedia, http://en.wikipedia.org/wiki/Airborne_wind_turbine [4.6.2013]"