Answer:
<u>d. Increase of the amount of CO2 in the atmosphere</u>
 
        
             
        
        
        
Answer:
look at the username        
Explanation:
Pipeline transport is becoming more popular these days because:
even thought they have a high cost of laying, the operational costs are minimum
Solids can be transported in a Slurry form
it rules out trans-shipment delays and losses