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Biological Agents and Invasive Species:

- Biological agents are viruses, bacterium, and parasites that affect human heath.

- Invasive agents are plants, fungus, or animal species that are not native to a specific location and have tendencies to cause damage to the environment, human economy, and health.

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Acute or Chronic pollution
Acute pollution : this means pollution incident which happens suddenly and which Is not allowed under the  provision of pollution control act.
hronic pollution : this is the permanent pollution caused either by repeated or continuous emissions of pollutants or the presence of very persistent pollutants .

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Biodegradable materials are materials that are capable of decomposing fairly quickly by the action of micro-organisms. Substances such as cotton, wool, wood, animal wastes and any other product based on natural materials are biodegradable.

Persistent pollutants do not break down easily, the most dangerous ones are organic pollutants, they are insoluble in water so they pass through the food chain and ever increasing concentrations for example DDT (a colorless crystaline tasteless and almost odorless organchlorine known for its insecticidal propertiesand environmental impacts).

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- The main difference between organic and inorganic matter is organic compounds contain carbon and carbon-hydrogen bonds, while most inorganic compounds do not contain carbon. Organic compounds are produced by and are associated with living organisms. Inorganic compounds are created by non-living natural processes or human intervention.

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group 2

Thermal pollution changes the temperature in an area, usually with a rise in temperature of water or air. Water that has been used for cooling purposes re-enters the water body several degrees warmer than the surrounding water. Deforestation has marked impacts on the microclimate of an area causing an increase in exposure to the sun and higher temperatures. The urban heat island effect can raise the temperatures by as much as 10°C. Higher temperatures decrease the oxygen content of the water, which impacts flora and fauna. All organisms have a tolerance range for many things including temperature and if the environment goes outside of that range it is detrimental to the organisms.

Light pollution is one of the less considered types of pollution and it is caused by poor use of lighting in towns and cities. A lot of light pollution is caused by street lamps and general high usage of lighting in homes. It can have detrimental effects on:

The timing of biological activities such as frog mating calls.

It disrupts many animals navigation e.g. moths, turtles.

It can interfere with sleep cycles, including humans.

Noise pollution is the presence of loud sounds that can be harmful or just plain annoying. Sources include traffic, open cast mine blasting, airports or loud music. It can disrupt marine mammals ability to navigate, upset nesting birds, damage hearing and cause general stress.

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Group 6 (Anvitha, Zeina, Dhruvi): Primary and Secondary. 

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Group 6 (Anvitha, Zeina, Dhruvi): Primary and Secondary. 

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Primary:

Pollutants that are directly released into the environment from a source
Secondary:

Pollutants form when primary pollutants react with the environment.

Example of Primary:

carbon monoxide (CO)

odorless, colorless, poisonous gas

created by incomplete combustion (especially bad with older cars)

generates headaches, drowsiness, fatigue, can result in death

oxides of nitrogen (NOx, NO)

NO - nitric oxide

emitted directly by autos, industry

sulfur oxides (SOx)

SO2 - sulfur dioxide

produced largely through coal burning

responsible for acid rain problem

volatile organic compounds (VOCs)

highly reactive organic compounds

release through incomplete combustion and industrial sources

particulate matter (dust, ash, salt particles)

bad for your lungs

Example of Secondary:

form in the atmosphere through chemical and photochemical reactions from the primary pollutants

examples include:

sulfuric acid H2SO4

can cause respiratory problems

nitrogen dioxide NO2

gives air a brownish coloration

ozone O3

colorless gas

has a sweet smell

is an oxidizing agent - lung tissue to rubber products

irritates the eyes