Lecturer: Pr. Dinh
1/ Thùy Linh
2/ Nguyễn Hoàng Thảo Uyên
3/ Nguyễn Minh Hiền
4/ Nguyễn Trung Nghĩa
The energy resources that we are using now are most from fossil fuels such as coal, oil and natural gases. Fossil fuels have many advantages. A major advantage of them is their capacity to generate huge amounts of electricity in just a single location. They provide energy for industrial activities, food production, electricity to run machines, etc. The cost of energy from fossil fuels is lower than other kinds of energy and they are very potential sources.
energy use from fossil fuels in a home
However, these natural resources are also very harmful.
(1)non-renewable energy is very harmful for the environment and human health. (2)Coal, oil burnings are major sources of carbon dioxide emissions (3)that causes greenhouse effects and the global warming. Environmentally, (4)the mining of coal results in the destruction of wide areas of land, causes pollution and other substances released when we exploit coal can cause lung or respiratory diseases. Besides these disadvantages, it can be seen clearly that (5)we are using the amount of fossil fuels faster than they can be replenished. (6)This leads to the shortage of energy for production and other activities and thus (7)affects the economies of many countries and the whole world. (8)Therefore, we should find alternative energy resources to meet our need and remain the energy resources for our future generations. (5) (2)
(6) (3) + (4)
There are some common types of alternative energy:
1. Solar energy:
Solar energy is the energy of the electromagnetic radiation coming from the sun, plus a fraction of the energy of other subatomic particles emitted from this star.
How Solar Power Works?
We all know that the main ingredient for solar power is the sun, but how does it work? The list below shows exactly how solar power works in 5 points.
1. Roof Mounted Solar Panels
these panels absorb FREE solar energy from the sun
this device converts the solar energy into power for your home or business 3. Electrical Panel
this is where the power gets distributed throughout your home or business for use 4. Utility Meter
any excess energy created by your solar system will flow into the utility grid through the meter 5. Utility Grid
state and national infrastructure that provides power to your home and business when demand exceeds solar production
2. Wind energy:
Wind energy is the kinetic energy of moving air in Earth's atmosphere. Wind energy is an indirect form of solar energy.
3. Geothermal energy:
Geothermal energy is a natural form of energy deep in the ground, arising from early sources of heat inside the earth, heat from friction due to the continental plates sliding over each other, and from the decay of the principles natural radioactive elements exist with one small stone.
Biofuel is a type of fuel whose energy is derived from biological carbon fixation. Biomass fuel can be in solid, liquid, gas ... is burned to release energy. Biomass can also be converted into liquid fuels such as methanol, ethanol used in the internal combustion engine;, or in the form of biogas (biogas)
5. Hydrogen energy:
Hydrogen fuel source is absolutely safe for humans. The material for the production of hydrogen is water and solar energy. Hydrogen gas is used as a fuel for internal combustion engines.
What kind of alternative energy does Vietnam can develop?
* Solar energy: with the total hours of sunshine reaches 2.500hours/year, the total...