Biology Questions and Answers
Environmental Issues..............................................................................................................
- What is pollution?
Pollution ecosystemis the contamination o by factors that are harmf an (^) ful
for the equilibrium of its biotic or abiotic
constituents.
- Is pollution always caused
by humans?
In most cases pollution human activity. Other species and someis caused by (^)
abiotic factors however can also pollute
an ecosystem. For eis created by proliferation xample, the red tideof some algae
and volcanicthe internal activity dust is a conse of the planet.quence of
- Why is waste considered
one of the major
environmental issues?
The environmwaste worsens with iental problem ndustrialconcer ning
development and the global growth of
consumption 21st centuries, factors that cause societies in the 20th theand
immense volume of residuals produced
by mankinincreased waste generation raises thd in the last decades. The (^) e
issue about what to do with waste since
nature is not able to degrade and resorbwith adequate speed and efficiency
most of the residuals. Therefore the
various kinds of waste accumulate,
polluting danger to the environmhumans and nature. (Theent and creatin g
present destination of waste has been
public waste dwaste volume is compresseepositories whd and buriedere the (^)
underground, an environmentally risky
method. Anothincineration, with er method has bthe grave een
consequence of causing air pollution.)
- What are the main types of
waste?
The waste can be classified into many
types, each of them carryindifferent environmental problem:g its own
organic waste, recyclable waste, non
recyclable waste, toxictoxic waste and space waste,waste. nuclear
The organic waste is more easilyresorbed by nature, but the speed and (^)
the geographical concentration oproduction due to urbanization generatef its (^)
pollution of rivers, lakes, proliferation of
disease vdegradation ectors and environmentalof towns. The recyclable (^)
waste is composed of residuals that can
be reprocessed, like plastics and metals; the used again by humans,problem
regarding recyclable waste is that the
separation oculturally diffused and there is notf such material is not (^)
enough social organization to use them;
so the recyclable waste is mixeother wastes increasing the volume ofd to (^)
waste depositories even more. The non
recyclable waste is fothat technology cannot yet recycle,rmed of residuals like (^)
ceramics, phcigarettes, plasticized paotographic ppers, eaper, mirrors,tc; this
kind of waste in the future may become
recyclable waste and should be
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