For a power-collecting Dyson sphere you don’t actually need all that much matter. Most of the sphere’s area can be thin metal foil that just acts as a mirror to concentrate light on power converters, for example. You could build it with asteroidal material.
If you really want to get massive, then Mercury is usually the first target people propose for demolition. Lots of heavy elements and already close in to the Sun. And nobody cares much about Mercury.
On earth? No, not by a long shot. We would need to get into the deconstructing planets business.
For a power-collecting Dyson sphere you don’t actually need all that much matter. Most of the sphere’s area can be thin metal foil that just acts as a mirror to concentrate light on power converters, for example. You could build it with asteroidal material.
If you really want to get massive, then Mercury is usually the first target people propose for demolition. Lots of heavy elements and already close in to the Sun. And nobody cares much about Mercury.
Or at the very least, the entire asteroid belt would put a good dent in it.