Alternative Engery

It is right way to go to gradually change to alternative energy from fossil fuel.  But it still has long way to go.

Bio-fuel: efficiency and cost are still big problem. I saw some gas station start to provide green gas, mixed gas + bio-fuel. Cost: $5.7/g.  Bio-fuel has only 63% efficiency of gas. Side Effects: food price up.

Solar Power: the cost is too high. There is no economy insentives at all before oil price higher than $200/b. Need a major technology break through to resolve that.
This is the most promising area for the future. But it still take time.

Wind Power: location constrained and less efficient.

Hydropower:  limited resource.

Nuclear Power: Cost and Environment issues. US does not build any Nuclear Power Plant in past 15 years.

Ocean Wave Power:  limitied and not easy to use.

The total alternative energy used in US is less than 5% of total energy consumption.

Still long way to go before the fossil fuel can be really replaced.