Unit 2: Humans and the environment

How many years maximum for a (high-density polyethylene) plastic bag to decompose?

• 50

• 80

• 100

• 150

How does Vietnam rank globally in air pollution?

• 27

• 36

• 54

• 87

Which country is known as the cleanest on the planet?

• Singapore

• England

• Denmark

• USA

What energy can't be recycled?

• Wind energy

• Solar energy

• Water energy

• Fossil fuels

Which of the following is about measures to protect forest ecosystems?

• Construction of nature reserves and national parks

• Reforestation, forest fire prevention

• Rational exploitation of forest resources

Which of the following types of garbage is not hazardous waste?

• Oil

• Paper

• Battery

• Paint

• Glass

Which of the following gases must not be released into the environment?

• Nitrogen

• Oxygen

• Ammonia

• Carbon monoxide

How many types of waste are there in Vietnam when it comes to domestic solid waste segregation at source?

• 1

• 3

• 4

• 5