for - economic growth - physical limits to - reductio ad absurdum - physical absurdity of continuing current energy and waste heat trends into the near future

paper details - title - Limits to Economic Growth - author - Thomas W. Murphy Jr. - date - 21 July, 2022 - publication - Nature Physics, comment, online - https://doi.org/10.1038/s41567-022-01652-6

summary - Physicist Thomas W. Murphy employs reductio ab adsurdium logic to prove the fallacy of the assumptions of his argument - In this case, the argument is that we can indefinitely continue to sustain economic growth at rates that have held steady at about 2-3% per annum since the early 1900s. - Using both idealistic and simplified energy and waste heat calculations of energy and waste heat compounding at 2-3% per annum (or 10x per century), Murphy shows the absurd conclusions of continuing these current trends of energy and waste heat emissions on a global scale. - The implications are that physics and thermodynamics will naturally constrain us to plateau to a steady state economy in which the majority of economic activity needs to not depend on physically intensive

from - Planet Critical podcast - 6th Mass Extinction - interview with science journalist Peter Brannen - https://hyp.is/66oSJD-AEe-rN08IjlMu5A/docdrop.org/video/cP8FXbPrEiI/

for - absurdity of indefinite economic growth - energy projection example of recent energy trends

-absurdity of indefinite economic growth - energy projections - Energy growth has typically been 2–3% per year since early 1900's. - This is approximately equivalent to 10x each century - Present-day energy output is 18 TW and extrapolates to - - approx.100 TW in 2100, - approx. 1,000 TW in 2200, etc. - In 400 years, from today, we would exceed the total solar power incident on Earth - In 1300 years from today, we would exceed the entire output of the Sun in all directions - In 2400 years from today, we would exceed the energy output of all 100 billion stars in the Milky Way galaxy - This last jump is made impossible by the fact that even light cannot cross the galaxy in fewer than 100,000 years. - Hence, physics puts a hard limit on how long our energy growth enterprise could possibly continue

for - absurdity of indefinite economic growth - waste heat projection example of recent waste heat trends

absurdity of indefinite economic growth - waste heat projection example of recent waste heat trends - At present, the waste heat term is about four orders of magnitude smaller than the solar term. - But at a growth factor of ten per century, they would reach parity in roughly 400 years. - Indeed, the surface temperature of Earth would reach the boiling point of water (373 K) in just over 400 years under this relentless prescription.

Socio-economic trends are split into three groups: OECD, BRICS and all other countries. This split reveals the unequal distribution of the indicators.