To be sustainable, an energy system must meet two conditions:


  1. 1.First, the energy system must have good prospects for enduring indefinitely in terms of the type and level of energy services it provides.  Moreover, given the significant energy use that will be required to improve human well-being in much of the developing world, the size of the global energy system would ideally grow substantially over this century.


  2. 2.Second, extraction, transformation, transport and consumption of energy must be benign to people and ecosystems.  Flows of the energy system’s material and energy byproducts must not exceed the ability of land, air and water to absorb and recycle them without significant negative disruption.  In this sense, both the known, cumulative impacts of the energy system must be negligible and any extraordinary risks it poses must be extremely unlikely, and ones from which the system could recover within a reasonable period of time, perhaps aided by rehabilitation efforts.

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Green Energy Organizations by Country

This is an international resource of environmental organizations, councils and associations organized by country (and state).

For specific alternative energy companies (such as the American Wind Energy Association), please click on the respective picture above.

Nuclear Power

The pros and cons of this powerful energy source.

Natural Gas

While natural gas is the cleanest of all fossil fuels, carbon dioxide is the main product of its combustion. What are we do?

Coal (and Clean Coal?)

Can coal really be clean?  Let’s find out...

TGD’s Choice: Green Links & Greener Resources

Exactly what you think it is: important information that every human should experience.

Definition of Sustainable Energy by Dr. Mark Jaccard from his 2005 book, Sustainable Fossil Fuels

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