Alternative energy technologies suffer from some common problems. First, several sources are intermittent and unreliable. These are natural resources so the wind does not always blow, the sun does not always shine and waves do not always occur. This gives rise to the inherent problem of providing a constant power supply to energy users.

Nationally, this may be resolved by using revolving supplies so that conventional fossil fuel power stations running at low output may promptly be increased to full output to meet sudden demands when alternative sources are not available. For instance, an eco friendly method could be to use pumped hydro-electric power in which water stored behind a dam would be released to meet peak demand and then pumped back later.

A more efficient solution will be to establish a distributed system over an entire continent so that when one county is producing excess power, it sends electricity to another region. Similarly, when there is no wind in Massachusetts, wind energy from Texas may be distributed.

Among the environmental groups, the most objective analysis seems to come from http://www.onebiosphere.com They have certain proposals about global warming solutions and answers to questions about the globe's loss of biodiversity.

Innovation and activity in the renewable energy economy is upsurging in the U.S. There are literally hundreds of companies that are working on overcoming the variety of obstacles to alternative energy sources. It has been estimated that in recent years, over $1 billion in venture capital has been invested annually in alternative energy projects. The amount of venture capital has been increasing rapidly as the cost of fossil fuels increases.

A major problem involves increasing the scale of energy projects. Renewable energy sources suffers problems upon mass utilization. Wind farms could impact atmospheric air circulation and even weather patterns. Tidal and wind systems could affect currents and local ecosystems. Excessive solar panels could prevent sufficient light reaching the earth so that instead of warming, potentially there could be cooling aka global dimming.

At this time, we cannot predict the impact of mass usage of alternative fuel sources on the global environment. We need to study how the mass usage of renewable energy sources would affect the world. We also should attempt to learn from our past mistakes as we plan for future energy usage.