Question

Resource Conservation recoverable resources: estimated amount of a resource that can be mined currently Global recoverable resources for coal are estimated at 930 billion short tons. Short tons: two-thousand pounds The recoverable reserves of coal in the United States are an estimated 263 billion short tons. proved reserves: estimated amount of natural gas that can be extracted profitably The United States has 237.7 trillion cubic feet of proved reserves of natural gas primary forests: forests containing native species with no significant disturbance of ecological processes through human