Why are businesses concerned about non renewable resources?

Nonrenewable resources are those sources which use is faster than their renovation cycle. It would eventually lead to source extinction. Among common nonrenewable sources, we can identify the oil and natural gas. Businessmen are concerned about nonrenewable sources since there is no scientific method by which those sources can be renewable. The day will come when there will not be more supply of those materials, ending along with it their business days.

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.