Biomass fuel production averages 1 watt per square meter compared to the 100 watts per square meter that solar power gives. Before fossil fuels civilization wa

Biomass fuel production averages 1 watt per square meter compared to the 100 watts per square meter that solar power gives. Before fossil fuels civilization was in many ways energy constrained, forced to make harsh tradeoffs in how much land was devoted to forests for heating/iron production and how much to farmland for food.