Like Global Warming/Climate Change/Environmental Debts, etc. are ideas that smart people devise to explain (now by computer programs {which they make up themselves}), and thus they build a model and create it to theoretically to prove whatever current point they are SELLING TO THE PUBLIC.
Cynical ... true; and also fact.
Do not buy the BS ... horse feathers!
Ineed, they are the science equivalent of snake-oil salesmen.