Resources such as trees, fish, oxygen, and fresh water are
generally considered to be renewable resources as they can be
continually reproduced. Fresh water from the Earth's
recycling process, fresh air from the oxygen produced by plants
and trees, and trees and fish which can reproduce themselves.
Words to know and
as you consider what resources are renewable
Having a limited existence
When are renewable resources not
|Plants and Animals
- When plant and animal species become extinct.
Fresh water - When fresh groundwater gets
used up and no rain falls, sometimes for years. (More then 3/4ths of
underground water is non-renewable, as replenishing it would take
centuries or more - Ecological Society of America). When chemical
spills are so toxic that the water and surrounding soils are polluted for a
lifetime (human lifetime). And think about population growth - as some 30-70 million people
are being added to our planet every year who will have water needs.
- When a forest of trees is clearcut, it can change the soil and the climate of the ecosystem so new trees
cannot grow, plants die, and animals lose their habitat and die or leave the area.
A natural forest has a variety of trees, plants, and lifeforms. A
natural forest creates climate. These ecosystems evolved over
a very, very long period of time and through many geologic and climatic
changes. Should humans, then, be allowed to buy whole ecosystems for
the purpose of destroying them - for money? That is what happens
when a forest is clearcut.
- When forests and plants (on land and in our ocean waters) are
destroyed or die from acid rain and pollution, they can no longer absorb carbon dioxide
from the air, nor release oxygen into the atmosphere. When rivers are
polluted by chemicals and erosion, oxygen is depleted from the water and
living things die.
- When land is
overgrazed or the nutrients in the soil used up from improper farming practices, the soil
cannot renew itself and plants and crops cannot grow. Crop rotation is
one way to help maintain soil fertility. When natural vegetation is
removed from land to clear it for construction projects, mining operations
or farmland, the plants and trees are no longer there to absorb rainwater
and protect the soil from wind. Erosion occurs and the soil is
washed away or soil particles are blown away in the winds. (see
Grasslands page regarding the Dust Bowl)
- When land is cleared
of vegetation in watershed areas that drain into rivers, lakes, streams, estuaries, etc.,
soil erodes into the water and the silt smothers the fish and plant life. When
pollutants drain into these waters, the toxins kill aquatic life and the pollutants can be
carried through the water far distances.
Biospheres of living things
- When pollution destroys an area, like the devastating Exxon Valdez oil spill and the
Chernobyl nuclear accident. Environmental disasters such as these affect whole
biospheres and damage all living things for thousands of miles for many, many years.
Nuclear contamination can last for longer than lifetimes.
Renewable is defined as:
Capable of being replaced by
- natural ecological cycles or
- sound management practices
So humans need to think of "renewable" as
replenishable only in the right circumstances
and within the laws of the balance of nature
(allow the natural ecological cycles to remain natural,
and "Don't mess with Mother Nature!")
"Oh well, it's renewable so we can
use as much as we want"
(Could this be the attitude of those who clearcut forests?)
"It won't matter what we do with our
toxic waste, just so we get rid of it"
(Could this have been the attitude of the cruise ship line
that was fined $18 million for dumping waste
and hazardous chemicals into the sea for many years?)
"We can't convert our old factories
toxic burning methods -
it's too expensive."
(Has this been the attitude of the "smog grandpas"
the EPA investigated in the power industry?)
"It's OK to log these forests - field
surveys are not needed."
(A Judge disagreed and put timber sales on hold,
Federal land managers must first conduct required wildlife surveys.)
"Industries can pull all the water they want from the Great Lakes, without
It's good for the region's nationwide competition for jobs...and after all,
water is a renewable resource, like air."
("All the water that will ever be is,
right now." - National Geographic 1993)
mis-management by humans and
pollution of the environment by humans.
HUMANS ARE RENEWABLE -
BUT ONLY IN THE RIGHT CIRCUMSTANCES
AND WITHIN THE LAWS OF THE BALANCE OF NATURE