Reference
This goes on an on about 30 trillion tons of human structures. Wow, that must be a big number! Why not compare it to the mass of water in air - 13 Giga-tons. Compare it to a shaving of rock off all the land mass. Compare it to what the glaciers moved. Compare it to the weight of vegetation.
This is pure philosophy-science. The article basically say we are destroying the earth. Blah. So that cockroaches can run over everything?
One nice thing about concrete cities, they have less radioactivity than freshly ploughed earth. :)
I'm with trumpy-pants on all this. :)
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