Others criticize his environmental credentials while he maintains a home five times the size of the average American house .
While Friedman supports the elimination of coal - based power , he believes improving coal technology is necessary in the short term .
Others criticize Friedman 's environmental credentials while he maintains a home five times the size of the average American house .
While Friedman supports the elimination of coal - based power , he believes improving coal technology is necessary in the short term .