Burning fuels adds humidity and volume as well as heat 

Adding more heat to the atmosphere by burning fuels and forests is like throwing oil on fire. Much of the Q we add is LQ in combustion gasses and from cooling towers. Hot dry air can absorb much Φ without warming as its Q is converted to LQ. So the atmosphere continues to absorb vast amounts of anthropogenic Q while talk about greenhouse effects and rising Ts distracts the world away from global warming's real causes and dangers. The poles are not melting because air Ts are rising. They are melting because moist air is shedding LQ to them.

It is time to base solutions to the global warming problems on honest science. It is assumed in classical thermodynamics that a working fluid (steam, combustion gas...) can only do mechanical work (W_mec) if it expands and pushes some object (piston, turbine blade.) as it does so. The fluid's volume increases as it expands whether it does W_mec or not. In accordance with first law of thermodynamics, the total energy in a mass remains constant if no energy is added to, or removed from, it. A fluid's P and T fall as it expands because the same energy is dispersed over a larger volume. It loses P and T faster if W_mec is also taken off it.