The following which is not an advantage of active or depleted oil and gas reservoirs for CO2 storage is it being available in all regions and is denoted as option 2.
What is Reservoir?
These are structures which are man made and used for the purpose of storage of different types of substances.
Reservoirs made for CO2 storage ensures easier recovery of hydrocarbons etc but aren't available in all regions thereby making it the most appropriate choice.
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