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Explain the difference between point and nonpoint. Which is harder?
- point source is coming from a specific known source
- non point source is when there is no specific source (non point is harder to control because we dont know where the pollution is coming from)
What are national parks controversial?
- people feed the animals
- this creates a change in animal behavior
Distinguish between acute and chronic toxicity?
- acute is immediate (affects humans)
- chronic is over time
Describe 2 of the 6 components of soil?
air, water, dead organic material, soil, fauna and floral, clay
Describe two ways to decrease air pollution
contorl nitrates and phosphates
What is environmental health?
natural, social, cultural, and biological
What are the two natural causes of climate shift?
- El Nino & Maloncovitch
- tilt of the earth
Define "emergent disease"
- a new disease that was not previously known to science
- it can also be a disease that was gone for 20 yrs. or more
Name two pieces of evidence for human induced climate change
- carbon in the ice in antartica
- change in seasons
- temperatures getting warmer
What are the five layers of soil?
- O A B E C layers
- O is organic
- A is the surface
- B is the subsoil
- E is leviated
- C is decomposed layers
Primary, Secondary, and Tertiary Water Treatments
What is the difference between a primary air pollutant and a secondary air pollutant?
- primary air pollutant are bas as soon as they are released
- secondary air pollutant can become bad
Name two ways to minimize the environmental costs of farming?
- organic farming
- control where the waste goes
- genetically modified crops, sustainable (controlled), strip farming
Define the term "health"
social, mental, physical well being
abnormal change in the body's functions
What is the green house effect?
- gas in the atmosphere, collects heat
- capture of energy/heat by gases in the atmosphere
Why is road construction a threat to global forests?
- damages roads to make roads
- others go and have full access
- people come in and destroy the habitat
What are endocrine distruptors ans why are they of concern?
- the endocrine systems produces hormones
- excess changes in sex ex: fish
- even in small concentrations they have bad affects(women pee and it goes into the water)
Name three alternatives to clear cutting forests
- sheerwood harversting: go in and cut down certain trees every 10 yrs or so
- strip cutting: lines, stripping
- selective: largest trees or varieties
Name 4 ways that water is important to life?
transports nutrients, density between solids/liquids, dissolves nutrients
Define "bioaccumulation" and "biomagnification"
- bioaccumulation: cells from a body absorb and take nutrinents from the environment (storage)
- biomagnification: moves its way up the food chain (DET) larger fish accunulates to eagles at the top of the chain(it stays in cells and magnifies)
What do wwe mean by old growth forest?
a forest where the trees are undisturbed by humans and they get to their full growth cycle
Give one example of non-point source watter pollution
- no specific point
- farm pesticides
What is the most vulnerable part of the Earth? Why?
Define the tem oxygen sag
there is an oxygen decline from the bacteria breaking down nutrients and taking the oxygen
Why does hunger persist in a wordl of surplus food production?
- war and other political issues
- the food is not evenly distributed
Describe two environmental costs of farming?
- irrigation (water)
- pesticides use
- pollution, water logging, salination
What is the green revolution?
when the government helps farmers grow high-yield crops
Give one example of point source pollution
factory- it is known where its coming from
Name 2 emergent properties of forests that are valuable to humans
- anythings that make forests better
- nutrients, shelter, food, oxygen
water rich in nutrients and organic material
Why is overgrazing such a problem?
- taking habitat destruction
Describe an example of environmental cost of water diversity by taking the water from the river to farms and cities
- less water in the rivers which may cause them to dry out
- need to remove people(relocation)
water low in wild life (clear)
Withdrawal is the total amount of water...
B) taken from rivers, lakes, acquifers
Economically, was is monoculture better for loggers?
A) largest benefit due to one type of forest
Goiter is a common disease resulting from a dietary shortage from
Disadvantage of conservation tillage methods?
C) increased pests and weeds
EPA assumes acceptable risk for environmental hazard is about 1 in ?
E) 1 million
What factor is important to decide if a country is water "rich" or "poor"?
E) renewable water supplies
Monetary inputs to local environment thru parks is called what?
Forests harvest method leave natural old growth forets?
NOT ON TEST: Most public rangelands are in poor condition due to what?
C) too many privately owned animals on public lands
One principle way lakes suffer from acid deposition?
B) fish eggs due to fish population fare
What is the layer of soil that is a mixture of minerals?
A) O layer (organic)
Biomagnification of DDT
A) higher ----level organism "inverse biological pyramid"
Hydrologic compartment that contains the greatest amount of fresh water is...
D) ice and water
Soil organism usually stays ___________ the soil
C) close to the surface
What is the basis of the statement that we can feed more people if we feed it to the people rather than feeding it to livestock?
B) Second Law of Thermodynamics
Most commom, loggers prefer "clear cut" logging because...
C) it is the most efficient, cheap, fast machinery
Sustainable farming is...
A) cheaper and safer than conventional farming
What are the advantages of genetically modified crops?
E) all resist drought and often even resist pests
High persistance of toxic chemical
Colifrorm bacteria populationg are routinely monitored in drinking water supplies because bacteria...
C) indicate the precense of feces in water
Principal problems that resusted from the construction of large dome include...
- E) all
- evaporation, salination, leaking, weakening,
National Parks are important
What are the greastest threat to humans?
Plants that take up heavy metals found in water are an example of what?
Atmospheric zone where events occur is what?
Activity shore of
What is not found in water than has gone thru the tertiary treatment?
Famines are most often serious when
drought and war
What are the three crops that humans rely on for majority nutrients and
wheat, rice, and maize
type of ----susceptible to acid
The parent material layer of soil is composed of what?
Cutting of rainforests. Which statement is how rainforest and tied to human mobility?
mosquitoes with an aquatic form spread many hgihly contagious disesases