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Carbon dioxide (CO2) emission:
Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities. In 2010, CO2
accounted for about 84% of all U.S. greenhouse gas emissions from human activities. Carbon dioxide is
naturally present in the atmosphere as part of the Earth's carbon cycle (the natural circulation of carbon
among the atmosphere, oceans, soil, plants, and animals). Human activities are altering the carbon
cycle--both by adding more CO2 to the atmosphere and by influencing the ability of natural sinks, like
forests, to remove CO2 from the atmosphere. While CO2 emissions come from a variety of natural
sources, human-related emissions are responsible for the increase that has occurred in the atmosphere
since the industrial revolution.
U.S. Carbon Dioxide Emissions, By Source
Note: All emission estimates from the Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-
2010.
The main human activity that emits CO2 is the combustion of fossil fuels (coal, natural gas, and oil) for
energy and transportation, although certain industrial processes and land-use changes also emit CO2.
The main consequence of CO2 emissions is in all over the world in the following.
1) Increasing in temperature2) Changing in rainfall3) Health problem
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4) Flood and drought5) Land degradation6) Loss of biodiversity
Increasing in temperature:
Temperature is a physical quantity that is a measure of hotness
and coldness on a numerical scale. It is a measure of the local thermal energy of matter or radiation; it
is measured by a thermometer, which may be calibrated in any of various temperature scales, Celsius,
Fahrenheit, Kelvin, etc.
Changing in rainfall:
Changing in rainfall encompasses the rainfall distribution across
different regions of the planet Earth. In mountainous areas, heavy precipitation is possible where
upslope flow is maximized within windward sides of the terrain at elevation. On the leeward side of
mountains, desert climates can exist due to the dry air caused by compressional heating
Health problem:
Health effects of carbon monoxide:
Headaches, dizziness , shortness of breath, slower reflexes and reduced perception,
at high levels: seizures, unconsciousness, coma, respiratory failure and death.
Flood and drought :
Carbon dioxide (CO2) flooding is a process whereby carbon dioxide is injected into an oil
reservoir in order to increase output when extracting oil.
Each year in Bangladesh about 26,000 km2, (around 18%) of the country is flooded, killing over
5,000 people and destroying 7 million homes. The floods have caused devastation in Bangladesh
throughout history, especially during the years 1966, 1987, 1988 and 1998. More recent floods
include 2004 and 2010
Small scale flooding in Bangladesh is required to sustain the agricultural industry, as sediment
deposited by floodwaters fertilizes fields
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Drought tolerance refers to the degree to which a plant is adapted to arid or drought
conditions. Desiccation tolerance is an extreme degree of drought tolerance
Land degradation:
Land degradation is a process in which the value of the bio physical environment is affected by one or
more combination of human-induced processes acting upon the land.
the process of land degradation:
The process by which land is damaged to the point where it can no longer support the local ecosystem.
Loss of biodiversity:
Deforestation on a human scale results in decline in biodiversity, and on a natural
global scale is known to cause the extinction of many species. The removal or destruction of areas of
forest cover has resulted in a degraded environment with reduced biodiversity. Forests support
biodiversity, providing habitat for wildlife; moreover, forests foster medicinal conservation. With forest
biotopes being irreplaceable source of new drugs (such as taxol), deforestation can destroy genetic
variations (such as crop resistance) irretrievably.
Solid/ liquid/gaseous waste:
Solid, liquid, or gaseous by-products resulting from human biological processes, manufacturing,
materials processing, consumption of goods, or any other human activity. This does not include the
processing and storage facilities for such waste. This does not include any latent waste released into or
present in the environment.
Industrial Waste: All solid, liquid, and gaseous waste resulting from the manufacture of goods.
This does not include the processing and storage facilities for such waste. This does not includeany latent waste released into or present in the environment.
Medical Waste: All solid, liquid, and gaseous waste resulting from the treatment of illness andtrauma. This includes the waste produced by all hospitals and clinics. This does not include
waste resulting from the manufacture of pharmaceutical, drugs, and medical supplies, which fallsunder Industrial Waste. This does not include radioactive medical waste, which falls under
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Medical Nuclear Waste. This does not include the processing and storage facilities for such
waste. This does not include any latent waste released into or present in the environment.
Oil and Gas Waste: All solid, liquid, and gaseous waste resulting from the discovery,
extraction, and processing of oil and natural gas. This includes drilling wastes. This does not
include the processing and storage facilities for such waste. This does not include any latentwaste released into or present in the environment.
Waste management is the collection, transport, processing or disposal, managing and monitoring of
waste materials. The term usually relates to materials produced by human activity, and the process is
generally undertaken to reduce their effect on health, the environment or aesthetics.
Pollution:
Pollution is the introduction of contaminants into the natural environment that causes adverse change.
Air pollution is the introduction into the atmosphere ofchemicals, particulates, or biological materials
that cause discomfort, disease, or death to humans, damage other living organisms such as food crops,
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or damage the natural environment or built environment.
Water pollution is the contamination ofwater bodies (e.g. lakes, rivers, oceans, aquifers and
groundwater). Water pollution occurs when pollutants are discharged directly or indirectly into water
bodies without adequate treatment to remove harmful compounds.
Land pollution is the degradation of Earth's land surfaces often caused by human activities and their
misuse of land resources. It occurs when waste is not disposed properly. Health hazard disposal of urban
and industrial wastes, exploitation of minerals, and improper use ofsoil by inadequate agricultural
practices are a few factors. Urbanization and industrialization are major causes of land pollution
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Noise pollution is displeasing or excessive noise that may disrupt the activity or balance of human or
animal life.he source of most outdoor noise worldwide is mainly caused by machines and transportation
systems, motor vehicles, aircrafts, and trains.
Degradation of forest:
Degradation is when something is degraded, or made worse.
Forest degradation means any negative changes in a forest that damage its productivity; any time
a forest is made worse by
overexploitation (any time it is used too much by farmers or tourists), logging (deforestation), logging camps and logging roads built through the forest. air pollution, fires, insects and vegetation diseases. firewood scavenging animal foraging pasturing industrialisation (factories) urbanisation (buildings)
Sometimes the term Forest Degradation does NOT include cutting down trees, which is then
referred to as Deforestation.
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Reducing emissions from deforestation and forest degradation (REDD) is a set of steps designed to use
market and financial incentives in order to reduce the emissions ofgreenhouse gases from deforestation
and forest degradation. Its objective is to reduce greenhouse gases.
Desertification:
Desertification is a type ofland degradation in which a relatively dry land region becomes
increasingly arid, typically losing its bodies of water as well as vegetation and wildlife. It is
caused by a variety of factors, such as climate change and human activities[citation needed].Desertification is a significant global ecological and environmental problem.
The world's great deserts have been formed by natural processes interacting over long intervals of time.
During most of these times, deserts have grown and shrunk independent of human activities. Pale
deserts are large sand seas now inactive because they are stabilized by vegetation, some extending
beyond the present margins of core deserts, such as the Sahara, the largest hot desert
Urbanization:
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Urbanization is the physical growth ofurban areas as a result of rural migration and even suburban
concentration into cities. Urbanization is closely linked to modernisation, industrialisation, and the
sociological process ofrationalisation. Urbanization can describe a specific condition at a set time, i.e.
the proportion of total population or area in cities or towns, or the term can describe the increase of this
proportion over time. So the term urbanisation can represent the level of urban relative to overall
population, or it can represent the rate at which the urban proportion is increasing.
Urbanization occurs as individual, commercial, and governmental efforts to reduce time and expense in
commuting and transportation while improving opportunities for jobs, education, housing, and
transportation
Destruction of wetland:
A patch of land that develops pools of water after a rain storm would not be considered a "wetland,"
even though the land is wet. Wetlands have unique characteristics: they are generally distinguished
from other water bodies or landforms based on their water level and on the types ofplants that thrive
within them. Specifically, wetlands are characterized as having a water table that stands at or near the
land surface for a long enough period each year to support aquatic plants.
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The causes of wetland destruction is mining, construction, pollutants, releasing of toxic chemicals...
A wetland is a land area that is saturated with water, either permanently or seasonally, such that it
takes on the characteristics of a distinct ecosystem. The water found in wetlands can be saltwater,
freshwater, or brackish Wetlands play a number of roles in the environment, principally water
purification, flood control, and shoreline stability. Wetlands are also considered the most biologically
diverse of all ecosystems, serving as home to a wide range of plant and animal life.
Depletion of ground water:
Ground water depletion is when all the ground water is pumped out of an aquifer and no more
groundwater is left. This causes the water table to sink and lakes and rivers to sink as well.
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Groundwater is a highly useful and often abundant resource. However, over-use, or overdraft, can
cause major problems to human users and to the environment.
The most evident problem (as far as human groundwater use is concerned) is a lowering of the water
table beyond the reach of existing wells. Wells must consequently be drilled deeper to reach the
groundwater; in some places (e.g., California, Texas and India) the water table has dropped hundreds of
feet because of extensive well pumping. In the Punjab region of India, for example, groundwater levels
have dropped 10 meters since 1979, and the rate of depletion is accelerating. A lowered water table
may, in turn, cause other problems such as groundwater-related subsidence and saltwater intrusion.
Land slide/River bank erosion:
River Bank Erosion is the wearing away of the banks of a stream orriver. This is distinguishedfrom erosion of the bed of the watercourse, which is referred to as scour.
The roots oftrees growing by a stream are undercut by such erosion. As the roots bind the soil tightly,
they form abutments which jut out over the water. These have a significant effect upon the rate and
progress of the erosion.[
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In many places, whether or not the banks are unstable due to human activities, people try to keep a
river in a single place. This can be done for environmental reclamation or to prevent a river from
changing course into land that is being used by people. One way that this is done is by placing riprap or
gabions along the bank.
A landslide or landslip is a geological phenomenon which includes a wide range of ground movement,
such as rockfalls, deep failure ofslopes and shallow debris flows, which can occur in offshore, coastal
and onshore environments. Although the action ofgravity is the primary driving force for a landslide to
occur, there are other contributing factors affecting the original slope stability.
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Typically, pre-conditional factors build up specific sub-surface conditions that make the area/slope
prone to failure, whereas the actual landslide often requires a trigger before being released.
Acid rain:
Acid rain can have harmful effects on plants, aquatic animals, and infrastructure. Acid rain is caused by
emissions ofsulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere
to produce acids.
"Acid rain" is a popular term referring to the deposition of wet (rain, snow, sleet, fog, cloud water, and
dew) and dry (acidifying particles and gases) acidic components.
The principal cause of acid rain is sulfur and nitrogen compounds from human sources, such as
electricity generation, factories, and motor vehicles. Electrical power complexes utilizing coal are among
the greatest contributors to gaseous pollutions that are responsible for acidic rain.
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