Environment

Question 1

How is nitrogen oxide produced in car engines?

Answer 1

• high temperature in car engine
• nitrogen reacts with oxygen in the air

Question 2

What is sustainable development?

Answer 2

Improving infrastructure or society without compromising needs for our future generation

Question 3

How do greenhouse gases cause global warming? (4)

Answer 3

• greenhouse gases allow short chain hydrocarbons to enter atmosphere
• which are absorbed by the earth and remitted as longer wavelength radiation
• which is absorbed by greenhouse gases
• increasing the temperature and thus leading to global warming

Question 4

What needs to be removed from agricultural waste water?

Answer 4

• microbes
• bacteria
• pathogens