Disaster is a sudden, calamitous event bringing great
damage, loss, and destruction and devastation to life and property. The damage
caused by disasters is immeasurable and varies with the geographical location,
climate and the type of the earth surface/degree of vulnerability. This
influences the mental, socio-economic, political and cultural state of the
affected area.
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Tuesday, December 5, 2017
Waste
Waste, or rubbish, trash, junk, garbage, depending on the type of material or the regional terminology, is an unwanted or undesired material or substance. It may consist of the unwanted materials left over from a manufacturing process (industrial, commercial, mining or agricultural operations,) or from community and household activities. The material may be discarded or accumulated, stored, or treated (physically, chemically, or biologically), prior to being discarded or recycled. It is also used to describe something we use inefficiently or inappropriately.
Ozone Layer Depletion
Ozone is composed of three oxygen molecules and. is produced naturally by sunlight. At ground level ozone is a pollutant, but in the upper stratosphere (a segment of atmosphere extending approximately 9 miles to 30 miles above the earth's surface) it forms a layer that protects the earth from the sun's harmful ultraviolet radiation. Although ozone composes a small part of the atmosphere's total mass, it absorbs more than 99% of the sun's ultraviolet radiation.
Acid Rain
Acid rain is rain consisting of water droplets that are
unusually acidic because of atmospheric pollution - most notably the excessive
amounts of sulfur and nitrogen released by cars and industrial processes. Acid
rain is also called acid deposition because this term includes other forms of
acidic precipitation such as snow.
Marine Pollution
Marine pollution refers to ocean contamination, especially
with man-made waste or byproducts. This is considered to be a severe problem by
many environmentalists, since it can have detrimental and lasting effects on
the global marine ecosystem. There are several types of marine pollution, each
of which has the potential to harm the delicate balance of life.
Land pollution
Land pollution is the deterioration (destruction) of the
earth’s land surfaces, often directly or indirectly as a result of man’s
activities and their misuse of land resources.
It occurs when waste is not disposed off properly, or can
occur when humans throw chemicals unto the soil in the form of pesticides,
insecticides and fertilizers during agricultural practices. Exploitation of
minerals (mining activities) has also contributed to the destruction of the
earth’s surface.
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