Although nuclear fusion offers the potential of significant amounts of energy for the future, it is expensive to research and develop into a stable power generation source. (power-technology.com)
Since muscle takes significant amounts of energy to cool and carry, there is without doubt a point of diminishing returns as an aerobic athlete builds muscle. (bengreenfieldfitness.com)
«If economics is the sole focus, then less expensive technologies that require significant amounts of energy for their manufacture, maintenance and replacement might win out — even if they ultimately increase greenhouse gas emissions and negate the long - term benefits of implementing wind and solar power.» (sciencedaily.com)