If you were able to gather together all known life in the universe, the mass of this organic ball would be about 1,1 teratonnes – that’s kilos. Against this, the mass of all human-made objects is slightly greater. More importantly, this so-called “anthropogenic mass” – the sum of all things in existence – is doubling every 20 years. Each week we produce a mass of objects per person equal to your own bodyweight.This might make you think that a lot of human things must be very heavy or very large... Jack Self, 2022 (Extract from the introduction text). Full text here