The IEA's record shows that energy demand will be 50% higher by 2040. Today, some 95% of energy is sourced from fossil fuels. By 2040, fossil fuels' contribution will fall to 80%. 
The sad problem we are witnessing: the environmentalists' exaggerating hysteria about the damage caused by "AGW" is turning off the public, and is doing more damage to the acceptance of environmental policies than anything else.
In the long run, it is the relative cost of a specific energy source that will determine it's acceptance. The insane government subsidies dished out in some jurisdictions (e.g., Ontario) will do no more than damage their economies and living standards.