So from what I understand, virtual particles that are created at the edge of a black hole can become the small detectable radiation (hawking radiation) if one of the particles falls into a black hole, becoming a real particle (its partner now no longer has to annihilate with it) and the second particle can either fall into the black hole w/ it or escape to infinity. My question is, if the black hole is in a very empty part of space (so it is not taking in much matter and energy), would its emission rate decrease and how so? If particles were just continually being created at the horizon of a black hole wouldn't that violate conservation of energy? Edit: Considering a particle and anti particle are created, and one falls into the black hole (lets assume that it is a negative mass particle) then it would decrease the mass of the black hole, and the other particle would increase the mass/energy of the surrounding space. Is this why the law of conservation of energy holds?