ВУЗ:
Составители:
Рубрика:
• solar energy;
• geothermal energy;
• petroleum;
• wind energy;
• biomass.
B. Suggest your answers to these questions?
1) Which kind of energy was the first to be used by people?
2) Which kind of energy is the most widely used now?
3) Which kind of energy is the most environmentally friendly?
17. Read the texts and check your answers in the previous activities.
RENEWABLE ENERGIES
Biomass -- Energy From Plant And Animal Matter
Biomass is organic material made from plants and animals. Biomass
contains stored energy from the sun, absorbed by plants in a process called
photosynthesis. Some examples of biomass fuels are wood, crops, manure,
and some garbage.
Biomass can pollute the air when it is burned, though not as much as
fossil fuels. Burning biomass fuels does not produce pollutants like sulfur,
that can cause acid rain. When burned, biomass does release carbon dioxide,
a greenhouse gas. But when biomass crops are grown, a nearly equivalent
amount of carbon dioxide is captured through photosynthesis.
Energy From The Sun
The sun has produced energy for billions of years. Solar energy is the
sun’s rays (solar radiation) that reach the earth. Solar energy can be con-
verted into other forms of energy, such as heat and electricity.
The major disadvantages of solar energy are:
• The amount of sunlight that arrives at the earth's surface is not con-
stant. It depends on location, time of day, time of year, and weather condi-
tions.
• Because the sun doesn't deliver that much energy to any one place
at any one time, a large surface area is required to collect the energy at a use-
ful rate.
Using solar energy produces no air or water pollution but does have
some indirect impacts on the environment. For example, manufacturing the
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