Environmental Degradation 0777 613234 0717 613234 https independent

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Environmental Degradation 0777 613234, 0717 613234 https: //independent. academia. edu/Punchi. Bandage. Dharmasena

Environmental Degradation 0777 613234, 0717 613234 https: //independent. academia. edu/Punchi. Bandage. Dharmasena

Contents This lecture includes � What is Environmental Degradation � Main causes for degradation

Contents This lecture includes � What is Environmental Degradation � Main causes for degradation � Effects of Env. Degradation � Solution �

THE ENVIRONMENT

THE ENVIRONMENT

Environment: the total of our surroundings • All the things around us with which

Environment: the total of our surroundings • All the things around us with which we interact: • Living things • Animals, plants, forests, fungi, etc. • Non-living things • Continents, oceans, clouds, soil, rocks • Our built environment • Buildings, human-created living centers • Social relationships and institutions

Humans and the world around us • Humans depend completely on the environment for

Humans and the world around us • Humans depend completely on the environment for survival. – Enriched and longer lives, increased wealth, health, mobility, leisure time • But natural systems have been degraded – Pollution, erosion, and species extinction – Environmental changes threaten long-term health and survival.

Natural resources: vital to human survival substances and energy sources needed for survival •

Natural resources: vital to human survival substances and energy sources needed for survival • Perpetually available: sunlight, wind, wave energy • Renewable over short periods of time: timber, water, soil, wildlife? • These can be destroyed • Non-renewable resources: Oil, coal, minerals • These can be depleted

Water Resource Limits • In 1950, people used half of accessible water • Are

Water Resource Limits • In 1950, people used half of accessible water • Are now dependent on dams • Pollution loses 33% of potential water

Less than 1% of the total water on the Earth

Less than 1% of the total water on the Earth

Deforestation • Deforestation has not only resulted in irreversible damage to the natural habitat

Deforestation • Deforestation has not only resulted in irreversible damage to the natural habitat of many wildlife species, but has also resulted in loss of biodiversity and increase in aridity.

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