What exactly are these energy limits, why are you expecting us to hit them soon, and what is "soon"? As an ignoramus on this, it sounds to me like all those predictions that we'll soon run out of oil [0].
[0] "Petroleum has been used for less than 50 years, and it is estimated that the supply will last about 25 or 30 years longer. If production is curtailed and waste stopped it may last till the end of the century. The most important effects of its disappearance will be in the lack of illuminants. Animal and vegetable oils will not begin to supply its place. This being the case, the reckless exploitation of oil fields and the consumption of oil for fuel should be checked."
July 19, 1909 Titusville Herald
[0] "Petroleum has been used for less than 50 years, and it is estimated that the supply will last about 25 or 30 years longer. If production is curtailed and waste stopped it may last till the end of the century. The most important effects of its disappearance will be in the lack of illuminants. Animal and vegetable oils will not begin to supply its place. This being the case, the reckless exploitation of oil fields and the consumption of oil for fuel should be checked." July 19, 1909 Titusville Herald