The world's best thinkers on energy and climate
Introduction: The concept of a “hydrogen economy” took a hit in the first years of the new century when hydrogen was touted as the clean transportation fuel of the future. Prolonged failure to deliver on that vision tarnished popular perceptions. The concept didn’t die, but it receded from public attention. … [Read more...]
As part of the quest of having energy sources that produce near-zero CO2 emissions, energy systems analysts have looked at hydrogen as one such source. They see hydrogen as a possible fuel for transportation. In California, the hydrogen economy movement has received support, in the form of subsidies and demonstration projects, from the state government and environmental groups, often supported and financed by prominent Hollywood … [Read more...]
About a sixth of the world’s electricity is produced by hydro-power and about seventy percent of its renewable energy. This renewable energy source exploits the energy potential of gravity, which is overcome by evaporation that converts water on a surface of a body of water into a vapor that rises to a higher elevation where it is precipitated and gains new gravitational potential. A mass of water (in kgs) raised to a height (in meters) times … [Read more...]
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