I didn't see your prior post, however, generally speaking, energy can be lost, gained, or conserved, depending on the work done on the system. If a block is at rest on a frictionless table, with no energy, and you push it, it gains energy because of the work you must do to get it moving. The same block might then lose energy when it runs into a surface with friction. Or keep the same energy when only gravity is involved (like if it just fell off the table to the floor, energy would be conserved. Actually, when you consider that energy is required by a person when he pushes the block (chemical energy), or that work done by friction is converted to heat energy (the table gets hotter), in that sense, all total energy is conserved in each case. Regarding the wind force, that might be an air resistance force that slows the flight, and can create tremendous heat.