1. Traffic jams

2. 

- Pedestrians must pay attention to observe traffic vehicles when crossing the road.

-  When riding motorcycles, mopeds, electric mopeds, and electric bicycles, they must wear quality helmets and install them properly.
- Please fasten your seat belt when riding in a car in all rows of seats equipped with seat belts.
- When participating in traffic, they must go to the right, stay in the right part of the road and lane, and must obey the road signal system.
- Don't use your phone or do other things
- Signal must be given before the vehicle changes direction.
- If you drink alcohol or beer, don't drive.
- Do not exceed the specified speed and accelerate or overtake carelessly while driving.
- Keep a safe distance from the vehicle in front
- Respect, yield and help people when participating in traffic

3. Renewable sources of energy is regenerative energy or energy of unlimited sources of energy.

4. Non-renewable sources of energy is non-regenerative energy or energy of limited sources of energy.

5. We can do the simple things like turn off the TV when you're not watching, take shower instead of baths, don't leave the fridge door open, turn off lights when going out,... to save energy.

6. In the future, people will travel by flying transports. It'll like flying car or pilotless airplane... People will use them at home or at airport.

7. Because to the high rate of natural population growth and  birth rate is higher than death rate.

8. It's causing environmental quality to decrease (pollution of water, soil, air...), thereby affecting the quality of life of each person (lack of housing, inadequate health and education services, and lack of facilities. facilities,…).