Where the words come from
The definitions of renewable and non-renewable resources and of depletion, depletion of renewables only when extraction exceeds regeneration, the over-exploitation of fish stocks and timber, the sustainable yield as a harvest equal to natural growth, limits to future harvests and possible collapse, depletion of non-renewables as the amount extracted, reserves as the commercially exploitable stock, new discoveries and reappraisals adding to reserves, technology, costs and demand shaping which reserves are exploitable, and UK oil extraction of 4,367 million tonnes of oil equivalent between 1974 and 2022, 400 million more than other changes in stock added — Developing estimates of depletion for the UK natural capital accounts: 2024, Office for National Statistics (7 March 2024), Open Government Licence v3.0. https://www.ons.gov.uk/economy/environmentalaccounts/articles/developingestimatesofdepletionfortheuknaturalcapitalaccounts/2024. Changes: Condensed; "commercially exploitable" put as "can be extracted at a profit"; "other changes in stock" put as discoveries and reassessments, and the 3,967 million figure is the article's net other changes in stock for oil; "in its most basic form, the sustainable yield is equal to the natural growth rate" put as harvesting exactly the natural growth; "potentially leading to population collapse" put as "can collapse altogether"; the mistake note's point that a small stock may grow back only slowly follows the article's statement that natural growth depends on population size. The sentence on higher prices encouraging search and making deposits worth tapping is from Principles of Economics 2e (source openstax2e). Ours: the fish, coal and metal cases, recycling, and the checks.
A higher price encouraging firms to expand exploration for oil reserves, and fracking making known reserves of natural gas worth recovering that previously were not — Principles of Economics 2e, OpenStax, licensed CC BY 4.0. https://openstax.org/books/principles-economics-2e/pages/3-1-demand-supply-and-equilibrium-in-markets-for-goods-and-services and https://openstax.org/books/principles-economics-2e/pages/11-4-the-great-deregulation-experiment. Changes: 3.1's list of actions a higher petrol price prompts cut to searching for more; 11.4's "enabled the recovery of known reserves of natural gas that previously were not economically feasible to tap" generalised to deposits becoming worth tapping; used in the second explain, which carries the ONS source id.
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