10th July 2024
In less than a month the world’s population will have used up a year’s worth of renewable resources. Earth Overshoot Day – this year 1st August – is the day when our consumption of resources exceeds the rate at which the earth can regenerate those resources for future consumption.
Natural resources regenerate over time. For example annual plants such as wheat, poppies, beans lettuces produce seeds each year which can sprout and produce a fresh crop. Some do this on an annual cycle, whilst others, such as rice, may reproduce several crops per year – depending on climatic conditions. Other plants have a much longer regenerative time frame. An oak for example may take 150 years to be of an age to produce acorns.
The same is true for fauna. Some species such as fruit flies will produce the next generation within a matter of days, where as for an elephant, the time scale is closer to twenty years.
Other regenerative resources include water, nitrogen and carbon. The life cycle of these varies according to climatic, topographical, and other factors. In tropical rain forests water can go through a daily cycle of rainfall, evaporation, condensation and once again, rainfall. In the artic regions rainfall is usually infrequent with much of the water then being locked away as ice sheets and glaciers.
Air, soil and water have regenerative features in terms of absorbing and ‘cleaning’ pollutants. One of the major causes of the current climate breakdown is our human action in pumping more carbon dioxide into the atmosphere than can safely be absorbed. The safe level of carbon dioxide in the atmosphere is around 280 part per million. In March 2024 CO2 levels were at 425 ppm and still rising.
The Green Tau 