I understand that all on the surface is likely small in comparison the earth whole mass, but if all that is created and all which disappears is just a renewal of the same elements..is earth’s weight a constant..?
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As many said, space debris amounts to thousands of tons per year. But even if you clean up space to perfection, the energy(!) we receive and use would be measurable as described by E=mc², i.e. energy has the tiniest bit of mass. We use roughly one ton of energy per year as fossil fuels, and receive 43000 tons as light from the sun; the latter almost entirely gets back into space sooner or later. If the Earth’s atmosphere warms by 1°C on average, that amounts to 40 tons of energy as well.
tl;dr: climate change makes the world fatter.
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