Air Pollution "A world Health Problem" | Health and Safety
Hi, and welcome to this overview of air pollution. Air
pollution nowadays is considered as a major public health issue right around
this world. In this blog, we discuss about outdoor air pollution, what are the
types of pollutants and sources. We’ll also take a look at ways to reduce air
pollution and see how air quality is monitored. Moving from there we discuss
indoor air pollution, the consequences, the sources of pollution, and ways in
which we can reduce it.
What is air
pollution?
Air pollution occurs when the air is contaminated with
any kind of chemical-physical or biological agents. it is the world’s largest
environmental health risk, leading to millions of deaths around the world each
year. Although anyone can be affected by air pollution people who are most
vulnerable include elderly children and people with chronic lung or heart
disease. Let’s take a look at outdoor air pollution first the outdoor air can
be polluted by natural sources or human sources natural or biogenic sources of
air pollution include pollen bush fires or dust from deserts. Pollution of the
air from human sources also called anthropogenic air pollution, is commonly due
to industries burning of fossil fuels and the use of Motor Vehicles.
There are hundreds of different types of air
pollutants. Let’s take a quick look at a few important ones. Starting with the
interesting subject of PM (i.e. Particulate Matter) it is a complex mixture of
small particles and liquid droplets that are mainly from industry or motor
vehicle exhaust dust storms or bushfires. Particulate Matter is classified
according to the diameter of the particles the health effects of particulate
matter are mostly due to particles that are less than 10 micrometers in
diameter these particles can reach the deepest parts of the lungs and enter the
bloodstream. Second, Nitrogen dioxide usually formed when fuel is burned at a
high temperature. Common sources are the exhaust
of automobiles industry, Power Plants, and Gas Stovetops. Moving to
the third and the interesting form of source of air pollution, Carbon monoxide
which is colorless and odorless generated when the carbon and fuel don't burn
completely. The main source of carbon monoxide is motor vehicle exhausts and
therefore carbon monoxide levels are very high in areas with heavy traffic.
Other sources include industry incinerators and bushfires. What is Sulfur
dioxide? it is a gas that can be produced when sulfur-containing fuels are
burned during industrial processes, like in Power Plants and refineries in
which lead is produced mostly as a result of metal and ore processing. Motor
vehicle exhaust used to be a major source of lead pollution however regulatory
efforts to reduce lead and fuel have led to a massive reduction in lead
emissions. Ozone may be a gas that's not emitted on
to the air but is made as a results
of sunlight working on other chemicals within the air.
Ground-level ozone is a pollutant whereas ozone that occurs naturally in the
upper atmosphere has a protective function. There are hundreds of other air
pollutants that can lead to adverse health effects,
Consequences and the end results due to the exposure
of these pollutants can result in a wide range of short and long-term health
effects? The health effect will depend upon factors just like
the sort of pollutant concentration, length of exposure, and
individual characteristics of the person exposed thereto. It can range
from minor symptoms like irritation of the eyes, nose, and throat to more
severe conditions like heart and lung disease or cancer. It can also lead to
increased hospital admissions
and an increase in death rates. In 2019 outdoor air pollution was estimated to have
caused 4.2 million deaths around the world. In addition to causing health
effects, air pollution can also lead to damage to the property, reduced
visibility and have other effects on the environment like acid rain.
What can we do to reduce air pollution?
Well, there are many different ways to reduce air
pollution requires the combined efforts of governments. Industry and
individuals, for example, governments can take actions like developing
standards, regulating the level of pollutants in the air, developing policies
to reduce the environmental
impact of development and using clean energy sources.
The industry can take steps like reducing their
emissions to the environment taking measures to stop pollution
accidents or developing technology to scale back emissions like
electric cars. At a private level reducing the reliance on fossil
fuels are often achieved with actions like walking
using conveyance or choosing energy-efficient means of living and
transportation.
Let's have a look now at how air quality is monitored,
most of the countries have national laws and regulations to control air
pollution, these usually set out air quality standards that has got
to be adhered to those standards are began by each
country and can depend upon factors like technological
feasibility, economic considerations, capacity for air quality management
political and social factors. These standards specify the concentration of a
number of selected pollutants called criteria pollutants that are allowed in
the air. A useful way to track air pollution against the national standards is
a measure called the AQI (i.e. Air Quality Index). This term is a simple
numerical or color-coded representation of how clean the air is. There are
different ways of calculating the AQI but it's essentially a measure to what
the level of a pollutant is compared to what the national standard is.
The air quality index can be calculated for the
different pollutants from the above-generated formulae and the different
health-related concerns depending on the AQI is given shown by the
below-formulated diagram as per the AQI for your reference.
Now that we've got a look at the outdoor air pollution
and how-to monitor air pollution. let's have a look at indoor air pollution now
although the indoor air quality is affected by outdoor air. The quality of
indoor air can be significantly different, this is because there could be many
sources of indoor pollutants. the most common source of indoor pollution in the
world is solid fuels like wood, charcoal, dung or crop wastes, that are used
for cooking or heating around the world. Over three billion people use simple
stoves or open fires to cook or heat their homes. These methods are
inefficient and can lead to the generation of pollutants like particulate
matter which can result in concentrations indoors of up to 100 times more than
that of the outdoor air. other sources include tobacco smoke, chemicals
released from building materials, furnishings and household products,
pesticides, asbestos-containing insulation and products used for household
cleaning factors like inadequate ventilation and in some cases heat and
humidity can worsen indoor air pollution. Exposure to indoor air pollution can
lead to health effects similar to those caused by outdoor air pollution.
In 2019 the World Health Organization estimated that
3.8 million people died due to illness that could be attributed to household
air pollution caused by the use of solid fuel there are many ways to scale back
the indoor air pollution/contamination including controlling the pollution at
the source itself. This includes actions like changing from solid fuels to
cleaner and more energy-efficient solutions like biogas, electricity or solar
power improving cooking devices and reducing the need for open fire heating by
constructing energy-efficient housing making improvements to the indoor
environment. This may include increasing ventilation through windows or
chimneys or other design features like having the kitchen separate from the
house. Behavioral changes like properly maintaining stoves and chimneys can
reduce the buildup of pollutants exposure to indoor pollution also can be
reduced with actions like using pot lids to conserve heat and minimize cooking
time.
So, that's a look at air pollution an important public
health issue we've had a look at outdoor air pollution. Different types of
pollutants and their sources, ways to reduce pollution and how air quality is
monitored we've also talked about indoor air pollution, what are problems
associated with source of pollution and ways to reduce it.
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