Well ya see that there sun energy gets so dagnabbed concentrated in those there pannels that the poor li’l baby birds, bein’ much smaller and weaker than a big ol’ coal minin’ macho-man like me, ain’t able to withstand all that there sun energy. Coal tho? Coal stays rite thar in non-energy form ‘till you wanna use it, allowsin’ us to keep the energy levels below bird-killin’ amounts.