The input of energy by the Sun into the Earth's troposphere runs at about (1367 W/m^2) x Pi x (6,380,000 m)^2 = 174,807,372,360,000,000 W ~= 175,000,000 GW. In equilibrum, energy is reflected by clouds and surface or radiated off into space at the same rate.

Yearly total energy consumption is now about 450 exajoules (10^18 Joules) per year. Translated into watts (i.e. divided by the number of seconds a year), this is on average an energy consumption (and, in the end effect, heat input into the climate) at a rate of 5,700,000,000,000 Watts, or 5,700 GW.

So even if there is an increase by one or even two orders of magnitude, I don't see a significant global warming effect. Local warming is another thing.

_{*Lunatic*, n.
One whose delusions are out of fashion.}