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Environment Pros and Cons

Environmental issues

Jack Behling

on 1 February 2013

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Transcript of Environment Pros and Cons

Science Hour 5 Jack Behling Environmental Issues First of all, environmental issues fall into 3 different
Categories; Resource Use, Population Growth, and
Pollution. Resource use Anything in the environment that is used by humans is called a natural resource. There are two types Renewable and Nonrenewable resources. A non-renewable resource is a resource that will not be replenished in a reliable time frame, and a renewable resource is a resource that will most likely never run or will always be replaces or in a very long time will run out. Population growth The human population grew very slowly until about A.D 1650 when advances in Agriculture,
medicine, and waste disposal took a giant leap and our population has steadily increased ever since and is currently right under 8 billion, but Scientists predict that the population wont grow as rapidly in the future though. Pollution Pollution is the Contamination of the earth's
water, land, or air. Pollution can be causes by chemicals, wastes, noise, heat, and light. Pollution can destroy wildlife and can lead to a lot of
human health problems. 5 vocab words Natural Resource: Anything in
Environment that is used by people.
Renewable resource: A resource that is
either always available or is naturally
replaced in a relatively short time.
Nonrenewable resource: A natural resource
that is not replaced in a useful time frame.
Pollution: Contamination of Earths water, land, or air..
Environmental science: The study of the natural process's that occur in the government and how humans can effect them.
Aquaculture: The practice of raising fish and other water dwelling organisms for food.
Fishery: An area with a large population of valuable ocean organisms.
Sustainable Yield: A resource that cannot be replenished at the rate of its consumption.
Selective Cutting: Cutting only certain trees in an area.
Clear cutting: Cutting every tree in a certain area.
Biodiversity: The number of different species in an area
Keystone species: A species that influences the survival of
other species in an ecosystem
Extinction: Disappearance of all members of the species.
Endangered species: A species in danger of becoming extinct
Threatened species:A species in danger of becoming endangered
Habit destruction: The loss of a natural habitat.
Habit Fragmentation: The breaking of a habitat into smaller isolated pieces.
Poaching: Illegal killing of wildlfe in their habitat.
Captive breeding: The mating of animals in zoo's or preserves Making Environmental decisions Natural resources of the continents Some natural resources of the continents are coal,
light, energy, dirt, gold, silver, bronze, water, ect.
The earth's natural resources have to be preserved somewhat because if they're not then we our future
generations will not have the same luxury's as us. Forest Resources Some forest resources are fruits, berries, seeds, and
wood. Some of the different products made from trees
are maple syrup, rubber, nuts, lumber, and wood pulp (which helps in the process of making paper). But the most important thing about our forests is that they take in Carbon Dioxide and give out oxygen. By: Jack Behling OO ____ OO Decisions can be made on a Personal, local, national, and global levels depending on how big the issue is and what it is. Every decision that is made has at least some effect on the environment. Managing Forests There are so much forests in the United States, nearly one third of the Nations Lands land is forest! Many forests are on publicly owned land also. We should take pride in our forests and not chop them down all at once using the technique of selective cutting. Our forests produce valuable oxygen that is necessary to life and we should take advantage of the fact that we have so much forests. The value of Biodiversity Plants, animals, and other organisms provide many
foods and medicines. All species in a ecosystem are
connected in many ways. A keystone species influences the survival of other species in an ecosystem for example
a cheetah. Fisheries An area with a large population of valuable ocean
organisms is called a fishery. Some fisheries hold huge
schools of fish, and in the fisheries the fish's reproduce
in very large numbers. Overfishing is a huge threat to
all fish's because we catch the fish at a higher pace
than they can reproduce at and then they become
instinct and that's not good so we should use some
fishing techniques including, using nets with a
longer mesh, and setting fishing laws like No
poisoning the fish with cyanide or using
underwater dynamite. Factors affecting Biodiversity Factors that affect biodiversity in an ecosystem include area, climate, and diversity of niches. A large area will contain more species and a larger population than a smaller species. Forests contain only 7% of the earths land, but contains over 50% of the different species on all of the planet earth. Gene pool diversity Gene pool diversity is when they're is diversity
within a species group. Organisms receive a
combination of different traits from their parents,
and it is very extremely rare and almost certain that
you wont get the same traits as someone else and
everybody in the world is different. Extinction of species If every member of a species completly disappears from the planet earth it is called extinction. The number of species that have become extinct in the past few centuries has increased dramatically. Species in danger of becoming extinct forever are called endangered species. Species endangered of becoming endangered in the near future is called a threatened species. Causes of extinction Some reasons for extinction are Habitat Destruction,
Habitat Fragmentation, Poaching (which is illegally killing animals in their natural habitat), Pollution which may harm their environment, and Exotic species. Protecting Biodiversity Some great ways to protect biodiversity
are Captive Breeding, Laws and treaties,
habitat preservation. If we all support and
care for our different species we might be
able to find out more about our environment. o
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