resources depletion
TRANSCRIPT
RESOURCES DEPLETIONBy Sahareena Wali1st Semester CDPM
RESOURCES Resources are sources or supplies from
which benefit is produced. Resources are: Materials Services Other assets that are transformed to
produce benefits
Earth’s Natural Resources
The Earth is rich in natural resources that we use everyday. These resources are any valuable material of geologic origin that can be extracted from the earth.
Renewable Resources
Natural resources that can be replaced and reused by nature are termed renewable.
Some common examples include: Air (wind) Fresh water Soil Living organisms (trees) Sunlight
Nonrenewable Resources
Natural resources that cannot be replaced are termed nonrenewable.
Some common examples are: Fossil fuels (coal, oil, natural gas) Diamonds and other precious gems and minerals Types of metals and ores
• Important: Nonrenewable resources such as these exist in a fixed amount and can only be replaced by processes that take millions of years. If they are depleted, they are depleted for good.
Copper
Aluminum
Common uses of Earth’s Resources
A pencil uses zinc and copper (to make the brass), petroleum for the eraser, iron (in the machinery to make the pencil), pigments, clay and graphite. The only renewable resource in your pencil is the wood!
Your jeans, although they may be almost all cotton, are usually blended with petroleum-based synthetic fibers to cut down on shrinking
Trees: A renewable resource
Oil: A nonrenewable resource
RESOURCE DEPLETION Resource depletion is an economic
term referring to the exhaustion of raw materials within a region.
Causes of Resource Depletion Excessive or unnecessary use of resources Non-equitable distribution of resources Overpopulation Slash and burn agricultural practices, currently occurring
in many developing countries Technological and industrial development Erosion Irrigation Mining for oil and minerals drainage of wetlands forestry
Environmentalists and scientists often refer to the two different ends of the environmental problem as sources and sinks. Thus the environmental links to economic growth manifests themselves either.
1. Shortages in the “sources” or “tap” of raw materials/natural resources, and thus a problem of depletion.
2. As lack of sufficient “sinks "to absorb wastes from industrial pollution which “overflow "and cause harm to the environment.
MINERALS DEPLETION Minerals are needed to provide food,
clothing and housing. Depletion causes are: Greater consumption Large scale exploitation
OIL DEPLETION Oil depletion is the decline in oil: Production of a well Oil field Geographic area
DEFORESTATION Deforestation is the clearing of natural
forests by logging or burning of trees and plants in a forested area.
CAUSES: Clearing forests for agricultural reasons Overpopulation Ignorance
Environmental Impact ofDeforestation Global Warming Disturbance of water cycle Soil erosion Habitat destruction
WETLANDS Wetlands are areas that are often
saturated by enough surface or ground water to sustain vegetation.
Wetland provides services for: Food and habitat Improving water quality Commercial fishing Floodwater reduction
WETLANDS DEPLETION Causes of depletion are: Erosion Sedimentation Subsidence Rise in sea-level
WATER SCARCITY Water scarcity is the lack of sufficient
available water resources to meet the demands of water usage within a region.
Water scarcity involves:
1. Water shortage: caused by climate changes like glaciers; reduced stream, river flow, ponds etc.
2. Water crises: Not enough potable water for a given population.
Causes are: Excessive use Pollution Conflicts 3. Water stress: Difficulty of obtaining sources of fresh water or available sources deterioration.
Effects of Resource Depletion An increasing world natural resource
price leads, in the long-term perspective, to decreasing rates of economic growth of a resource-exporting country. The higher the share of a natural resource sectors the lower the equilibrium growth rate of GDP of a resource-rich country.
CONTROL Conservation is using natural resources wisely and
not contributing to pollution of the land, air or water. Human activities can benefit the environment and help preserve resources.
Conservation can include small-scale clean-up projects along roadways or building fences to prevent dune erosion to large-scale beach renourishment.
Planting trees is another way to support conservation as trees are too often removed without being replanted.
CONTROL The phrase “Reduce, Reuse, and Recycle” has been a catch phrase of the late
20th and early 21st centuries.
Reduce: Don’t use a resource if there is an alternative (walking vs. driving)
Reuse: Use a resource again without changing it or reprocessing it: Use glassware as opposed to paper plates and Styrofoam.
Recycle: Reprocess a resource so that the materials can be used in another item. People can recycle just about anything from cardboard to old shoes!
Protect: Prevent the loss of a resource (wildlife) by managing its environment. Rapid deforestation can wipe out both animals and plant life. By controlling the environment, we can control the resources.
THANK YOU