The world's energy equation is rapidly changing. Three recent developments have altered energy options, re-calibrated the calculation of supply and transformed the implications for the planet's environment. Unfortunately, renewable, pollution-free energies - although they continue to make advances - are not in this equation....
Read the rest at canada.com, The World's Changing Energy Equation
Here is another post on peak water that sets forth the issues, Is the U.S. Reaching Peak Water?
To state the obvious, energy + water = food
That is to say, there are the basic real resources that an economy requires as a life support system. MMT shows that the only actual constraint is real resources and that affordability is not a factor in approaching these issues expeditiously given the current monetary regime.