A recent report from WRI estimates that achieving replacement level fertility (the rate of fertility at which a population exactly replaces itself from one generation to the next) in Sub-Saharan Africa by 2050 would reduce food demand by around 600tn kilocalories (kcal) per year by the mid-century.
Achieving replacement level fertility, reducing food loss and waste, reducing biofuel demand for food crops and shifting our diets, will all go some way to closing the gap between food available and food required.
However supplies of SCMs are not sufficient to achieve replacement above about 30%.
Importantly, by combining various assays, it is possible to derive mechanistic toxicity data that complement descriptive toxicity assessments while also achieving replacement of animal testing.
Voluntary family planning programs since the 1960s have helped 48% of the world's population achieve replacement-level fertility or below.
Those countries can be divided further into 2 groups: countries such as Bangladesh and Kenya that have a reasonable chance of achieving replacement-level fertility in the foreseeable future, and those countries that still have a high birth rate.
A possible solution to this will be to replace 'universal threshold' with 'percentage rise' in circulating testosterone achieved under replacement therapy.
In the new novel, a lengthy exercise in futuristic science fiction, the hero, named Daniel, involves himself in the founding stages of a worldwide cult, Elohimism, that delivers its adherents into practical immortality, achieved through replacement of the deceased individual by a DNA-derived duplicate possessed of not only the same bodily traits but the same memories.
Low retention in the kidneys by PP-F11 could be achieved by replacement of the gastrin pentaglutamic acid sequence in minigastrins with five d-glutamic acid residues.
While characteristic strength of concrete could be achieved with replacement of Sand by Coal Ash, thermal conductivity value of concrete is reduced, while compared with normal concrete of same Mix.
