In other words , if all non-renewable resources were uniformly exhausted in 30 years , they would only account for 7 percent of available resources each year , if all available renewable resources were developed .
Annual renewable resources were multiplied times thirty years for comparison with non-renewable resources .
If all non-renewable resources were uniformly exhausted in 30 years , they would only account for 7 percent of available resources each year , if all available renewable resources were developed .
Annual renewable resources were multiplied times thirty years for comparison with non-renewable resources .