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Difference between environmental management and environmental conservation is;Environmental management is the planning and implementation of a plan to ensure effective and proper utilization of available resources in the environment while environmental conservation is the protection/preservation of available resources for posterity.
Internet is a global network of computer networks linked together while World Wide Web (www) is a vast collection of linked documents held on computers all over the world and is accessible via internet, it is a service of the internet.
Difference between real time processing and batch processing is;Real time- Data is received and processed so fast and the results returned so quickly that the process is instantaneous to the user.Batch-Data is accumulated and processed at a predetermined time. Once processing begins no amendments.
Opportunity cost is value of the foregone alternative where choice has been made while scale of preference is a list of wants in the order of their importance.
Scarcity refers to limited / inadequate in supply while Choice is selecting one item instead of the other(s).