Download Flashcards for Ch. 3 Test

nonpoint source
Air pollution in Los Angeles is what
type of source
natural resource
Occurs naturally in the environment
and is used by people
pollution
global
environmental
scientists
Contamination of Earth’s land,
water, or air
Decisions about how to protect
Earth’s atmosphere are made on
what level
Who provides the data that is
considered when resolving an
environmental issue
population growth
pollution
resource use
population growth
environmental
pollution
What causes a demand for resources
to grow
Three general categories of
environmental issues
What type of proposals have costs
and benefits that are often economic
Can be grouped in two categories,
point source and nonpoint source
Fresh water is what type of resource
natural resource
survival and
development
conservation
high level of
resource use
sustainable use
renewable resource
Humans depend on natural resources
for what two reasons
Allows resources to last longer
What makes a larger ecological
footprint
Using a resource in ways that
maintain the resource at a certain
quality for a certain period of time
Resources that are replaced as fast as
they are used
oil and coal
health and disease
Natural resources that were formed
over millions of years
Determines a population’s life or
death
Today’s human population of Earth
more than 7.1
billion
disagree
Experts agree or disagree over
whether the human population will
stop growing
yes
Do people live longer in most areas
of the world today than ever in
human history
exponential growth
medicine and
technology
natural resources
yes
fishery
Occurs when a population grows at
an ever-increasing rate
Advances in what have improved
human health and allowed for
tremendous population growth
As the human population grows, the
demand for what increases
If population and the demand for
natural resources continue to grow,
will the human population be too
large for Earth to support
An area with a large population of
valuable ocean organisms
aquaculture
new trees can be
planted to replace
trees that are cut
down
selective cutting
Raising water-dwelling organisms for
food in an artificial pond
Why can forests be renewable
resources
Cutting down only some trees in a
forest
setting fishing limits
Approach to managing fisheries that
can involve banning or restricting
fishing of certain species
to manage
resources for a
sustainable yield
Fishing methods like poisoning fish
with cyanide are outlawed for what
reason
erosion
they produce
oxygen and
absorbing carbon
dioxide
1/3
One disadvantage of clear-cutting
How trees help other organisms
What percentage of the US land area
is made up of forests
habitat destruction
Major cause of extinction
threatened species
Species that could become
endangered in the near future
Endangered Species
Act
protecting whole
ecosystems
biodiversity
keystone species
climate, area, and
diversity
Prohibits trade or products made
from threatened or endangered
species
The most effective way to preserve
biodiversity
Has both an economic and ecological
value within an ecosystem
Influences the survival of many other
species in an ecosystem
Ex. sea otter
Affect biodiversity in an ecosystem
rain forests
The most diverse ecosystems in the
world
habitat destruction
hunting
How can people directly cause the
extinction of some species