Extinction Loss of habitat Degradation of environment Pollution
Extinction takes place when the last number of a species dies.
Extinction of species may come suddenly when an otherwise healthy
species is wiped out completely due to toxic pollution . It is
estimated that over 99.9% of all species that ever lived are
extinct. The average span of most of the species is 10 millions
Habitat degradation the main cause of habitat degradation world
wide is agriculture with urban sprawl, logging, mining, and certain
fishing and hunting practices. Physical destruction: for e g,
destruction of ocean floors by bottom fishing . Vital resources
including water and food can be limited during habitat degradation
,leading to extinction of some species.
Habitats are the place where the organisms live. Habitat is the
natural home or environment of animals ,plants ,or other organisms.
Habitat loss is the loss area or natural place of an organism. It
is due to destruction ,fragmentation or degradation of habitat
Habitat degradation Habitat fragment ation Habitat
Agriculture . Land conversion for development. Water
development . Pollution. Global warming.
Environmental degradation is the deterioration of the
environment through depletion of resources such as air ,water, and
soil the destruction of ecosystems and the extinction of wildlife.
It can occur naturally or through human process. E g. ozone
depletion ,destruction of marine environment .
Industrial activities Population explosion Farm mechanization
Pesticides and insecticides Felling of trees Urbanization and
changing lifestyles Development projects Natural causes
Ozone depletion Acid rain Depletion of marine life Loss of
forests Pollution of ground water Soil erosion Air pollution
Desertification Global warming
Pollution refers to the act of contaminating the environment by
introducing certain hazardous elements that disturbs ecosystem and
directly or indirectly affects the living organisms.
AIR POLLUTION SOIL POLLUTION WATER POLLUTION NOISE
Reduced lungs functioning. Irritation of eyes, nose ,mouth and
throat . Asthma attacks Headaches and dizziness Cancer Premature
death Cardiovascular problems Reduced energy levels
Water borne diseases Damage to DNA Liver and kidney problem
Hormonal problems Cancer
Decreases the efficiency of a man Lack of concentration Fatigue
Causes of blood pressure Temporary or permanent deafness
Can alter metabolism of micro organism and arthtropods in a
given soil environment Disturbance in food chain. Negative effect
on predator animal species Animal extinction
The earths climate has changed throughout history There is
increasing occurrence of floods , famines , storms, hurricanes, and
so on Biggest climate change is greenhouse gases which results in