2. Key points:
- To identify sources of generating electricity;
- To classify these sources into renewable and non-renewable sources;
- To evalute advantages and disadvantages of each source;
- To understand the idea of sustainability;
- To identify global chalenges to the Earthاt future.
3. Nuclear energy:
- Nuclear reactions releases energy;
- Atoms of the mineral uranium are split creating
heat energy, which turns water to steam and
drives hue turbines to create electricity;
- This is expensive to build and there are risks of
radioactive leaks;
- Advantages:
1. relatively cheap to run;
2. Carbon-free electricity;
3. Reliably energy source;
4. High power output.
- Disadvantages:
1. Uranium is technically non-renewable;
2. Very high upfront costs;
3. Nuclear waste;
4. Malfunctions can be catastrophic
4.
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6.
7. Biomass:
- Burns plants, trees and organic matter to heat
steam to drive turbines;
- This method releases a lot of carbon dioxide, a
greenhouse gas, into the atmosphere;
- Serbia has a large quantity of this resource:
● every year more that 10 thousand tons is
wasted;
● This is a resource that can be used for:
1. biogas;
2. heating.
9. Geothermal energy:
- Simply explained banje;
- uses heat that is produces continuously inside
the Earthاs crust;
- Hot rocks below the Earth surface heat up the
water that produces the steam;
- The steam is then captured to power the
turbines;
- There are limited locations where this is
possible;
- This power stations are very expensive to
build;
- And location is sometimes very dangerous
10. Tidal energy:
- uses the rise and fall of tides to convert
incoming and outcomig tides into electrical
energy;
- Barages have to be built across coasts;
- This can be very expensive;
- Damaging to the environment;
- Blocking the ships and trade;
- Location where these plants could be built are
limited.
