Tag: air and water pollution control

Questions Related to air and water pollution control

Multiple choice biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

Cause:

Global warming
Effect:
Ice at North and South poles may melt causing sea-level to rise and floods to occur.

Which of the following can prevent the effect from happening?

  1. Deforestation

  2. Use of unleaded petrol

  3. Use of leaded petrol

  4. Both (A) & (B)

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using unleaded petrol reduces the emission of harmful pollutants, though global warming is primarily driven by CO2. Among the choices, it is the only one that represents a move toward cleaner energy compared to deforestation or leaded petrol.

Multiple choice chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

Which of the following is not a green house gas?

  1. Carbon dioxide

  2. Water vapour

  3. Oxygen

  4. Methane

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Green house gases (GHGs) are gaseous components of the atmosphere that contribute to the 'green house effect'. A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere. By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming. Some greenhouse gases occur naturally in the atmosphere, while others result from human activities. Naturally occurring greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide and ozone. Certain human activities, however, add to the levels of most of these naturally occurring gases.

Multiple choice chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

Deforestation leads to an increase in the amount of $CO _2$ in the air:

  1. because the number of trees which consume $CO _2$ is increased
  2. because the number of trees which consume $CO _2$ is reduced
  3. because the number of trees which fix $CO _2$ is reduced
  4. None of the above

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Deforestation leads to an increase in the amount of $CO _2$ in the air because the number of trees which consume $CO _2$ is reduced.