How long can the non renewable resources of the earth be used
Coal has been proven reserves of 14000 tons. According to the current world's coal consumption calculation, available for 500 years. Another estimate is that the world's coal reserves forecast is 10 trillion tons, but only about $7000 tons for excavation. With an annual capacity of 34 tons of calculation, can only be maintained for 200 years.
The world's total oil reserves, a pessimistic estimate of 2700 tons, is estimated at an estimated 6500 tons. There are 7000 tons of oil sands and oil shale. But the economic recovery of about 1750 tons. According to the pessimistic estimate, the minimum amount of about 1000 tons. According to the world's annual fuel consumption of 30 tons of projections, available for about 130 years. But the world's proven recoverable oil reserves of only 879 tons. Such as the exploitation of 30 tons per year, less than 30 years available light.
Natural gas reserves of about 1800 tons to 4000 tons. Recoverable reserves of natural gas in the world is about 7000000000 cubic meters. One view is that the world's total recoverable natural gas reserves of up to 28 billion 100 million cubic meters, only to meet the needs of the past 170 years.
