The environmental impacts of the concretization is one of the major issues in urban areas around the world. Which among the following is / are environmental hazard(s) of surface concretization? 1. Increased Carbon dioxide emissions 2. Radioactive Pollution 3. Urban heat island effect 4. Emission of harmful rays Select the correct option from the codes given below:

Answer: [D] 1, 2, 3 & 4

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