Which of the following causes Harmful algal blooms (HABs) or red tide in the oceans?

  1. Discharge of phosphorus-containing sewage in oceans
  2. Increase in saltinity of water
  3. Oil spill in ocean

  Select the correct option from the codes given below:

Answer: [B] 1 & 3 Only

Both discharge of phosphorus and oil spill help boost algal growth. Increase in salt amount in water reduces algae population in oceans.

This question is a part of GKToday's Integrated IAS General Studies Module