What do you feel is the ultimate source of sustainable energy for mankind?

Answer 1

I believe that the future of sustainable energy is in a diverse mix of renewables: solar electric, solar thermal, wind, small-scale hydropower, "tidal" power, & biomass. Of course all these are ultimately driven by the sun.

Hydrogen is not an energy source--it is a way to store energy. The energy to break water into its elements has to come from somewhere else.

We can get to energy sustainability much quicker and more cost-effectively if we also increase efficiency in everything from automobiles to lights & appliances.

Answer 2

Hydrogen... period. We've only begun to find ways to turn hydrogen into energy. Within the next 25 years expect a hydrogen revolution, with the majority of the worlds energy coming from this source. It's completely renewable as the process of converting the hydrogen into energy creates water as a bi-product allowing the whole process to run in a never ending cycle. And with research on using algea to convert water into pure hydrogen progressing like it is, we could soon have polution free energy. Fossil Fuels are not the future of our world. If anything they are what could bring humanity to destruction. Global warming is fact. We need to step away from fossil fuels and move on to the future of energy production. Hydrogen will eventually provide cheap, efficient and clean energy for the entire world.

Answer 3

fossil fuels

I feel that this energy is "sustainable" for far longer than their will be humans to sustain

These are the cheapest, easiest to employ, best fuels. That is why we use them. There are plenty of them for many years to come.

In 200 years, we will either have come upon something better and moved to it naturally, or we will have blown each up and gone to using much less energy

either way, my vote for ultimate is fossil fuels

Answer 4

Definitely solar power. It is the most abundant resource available. More efficient solar cell will enable us to capture this energy. In fact with current efficiencies it would only take 100km^2 of photovoltaics to power the USA. There are products in the development pipeline which have efficiencies of > 30% (nearly double current efficiencies).

Answer 5

Fusion of hydrogen.

It can be done; the only problem is that it cannot be controlled. Maybe, in the next 15-20 years (about the time fossil fuel runs out), scientists will get it right, I hope.

Answer 6

The Sun. It's the most stable and powerful source of energy available to us. The trouble so far has been harnessing that power. We'll figure it out.

Answer 7

love

Answer 8

I would have to say water.