Dibuat oleh : Tania Nabila Brian Ello Mikhal

1. Science Progress
Kelompok 2 G7-B
- Tania
- Nabila
- Brian
- Ello
- Mikhal

2. Increase in human population
. The human population always increases every year
. Reporting from the official website of the United Nation, in 2011 the
worlds population reached 7 billion people, then in 2016 it reached 7.4 billion
people and the world population in 2020 reached 7.7 billion

3. The impact of the human rise
- Air pollution
- Global warming
- Population density
- Greenhouse effect
- Increasing disease
- Extinction of flora and fauna
- Reduction of natural resources

4. Non-renewable energy
- Fosil fuels - Coal
-
- Oil - Natural gas
- Oil

5. Impact of fossil fuels
 All energy ingredients are good, if we dont overuse them. The impact
that occurs if we use too much is :
- Smog
- Global warming
- So many pollutions
- Extinction of fossil fuels

6. Renewable energy
 Example :
- Water - Air/wind - Soil
[
[ Wind is a renewable energy, therefore wind is used as energy for generating electricity. What
tools are used to turn wind into electrical energy? Wind turbine are devices that can turn wind
into electrical energy. What is a wind turbine? How do wind turbine work?]

7. What is wind Turbine?
 Wind turbine is are windmills used to generate electric power.
 - Wind is a form of solar energy caused by a combination of three concurrent events:
- The sun unevenly heating the atmosphere
- Irregularities of the earth's surface
- The rotation of the earth.

8. How wind turbine works
- Using electricity to make wind—like a fan—wind turbines use wind to make electricity. Wind
turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates
electricity.

9. What is the used of wind turbine?
 Can be use for home bussines
 Source of electrial energy
 For the benefit of the household

10. How to make wind turbine?
 The component of wind turbine are :
- Gearbox
- Brake system
- Generator
- Energy source
- Rectifier-inverter

11. Thank you~