Original sentence: **compressed air at 20 bar0.27.**compressed air at 300 bar40.14.**spring power (clock spring), torsion spring0.00030.0006.Burning local biomass fuels supplies household energy needs (cooking fires, oil lamps, etc.Conclusion: the highest density sources of energy are fusion and fission.Energy density, or how much energy you can carry, does not reflect energy conversion efficiency (net output per input) or embodied energy (what it costs to provide, since harvesting, refining, distributing, and dealing with pollution all use energy).Fusion includes energy from the sun which will be available for billions of years (in the form of sunlight) but humans have not learned to perform this trick for ourselves.Like any process occurring on a large scale, intensive energy use creates environmental impacts:  for example, global warming, nuclear waste storage, and deforestation are a few of the consequences of supplying our growing energy demands from fossil fuels, nuclear fission, or biomass.but have a much lower energy density
Edited sentence: Conclusion: by examining the table it can be seen that the best sources of energy (highest energy density) are fusion and fission.Fusion includes energy from the sun which will be available for billions of years (in the form of sunlight).but have a much lower energy density in addition to the fact that burning them emitts large amounts of toxic gases.compressed air at 20 bar0.27.spring power (clock spring), torsion spring0.00030.0006