Ozone layer healing

Dịch sang tiếng Anh:

Tầng bảo vệ

Dịch sang tiếng Anh:

Bầu khí quyển

Dịch sang tiếng Anh:

Tia cực tím

A new study says the ​ (a)   layer of the Earth's ​ (b)   is finally ​ (c)   from damage by humans' use of ​ (d)  

• protective
• atmosphere
• healing
• harmful chemicals.

Which of the following is a harmful chemical to the ozone layer?

• CFC

• Oxygen

• Hydro

• Carbon dioxide

Ozone is a .............. combination of three oxygen atoms

• colorful

• colorless

• brown

• black

What do ultraviolet rays cause?

• lung cancer

• skin cancer

• crop damage

What would an undamaged ozone layer do?

• release heat

• release greenhouse gases

• keep greenhouse gases