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The rising fertilizer use accompanying more people eating more has been called exponential (1) and prompted fears of polluted water and consequent methemoglobinemia (2) and hypoxia (3). It also has raised alarm about greenhouse warming (4) and an altered global N cycle and thus primary production (5) and diversity (1) of vegetation. In this plethora of(More)
This article describes the mathematics underlying the Loglet Lab software package for loglet analysis. " Loglet analysis " refers to the decomposition of growth and diffusion into S-shaped logistic components, roughly analogous to wavelet analysis, popular for signal processing and compression. The term " loglet " joins " logistic " and " wavelet. " Loglet(More)
We introduce an extension to the widely-used logistic model of growth to a limit that in turn allows for a sigmoidally increasing carrying capacity, that is, the invention and diffusion of technologies which lift the limit. We study the effect of this dynamic carrying capacity on the trajectories of simple growth models, and we use the new model to(More)
expecting that more and richer people will demand more from the land, cultivating wider fields, logging more forests, and pressing nature, comes naturally. the past half-century of disciplined and dematerializing demand and more intense and efficient land use encourage a rational hope that humanity's pressure will not overwhelm nature. Beginning with the(More)
Renewables are not green. To reach the scale at which they would contribute importantly to meeting global energy demand, renewable sources of energy, such as wind, water and biomass, cause serious environmental harm. Measuring renewables in watts per square metre that each source could produce smashes these environmental idols. Nuclear energy is green.(More)
Amid widespread reports of deforestation, some nations have nevertheless experienced transitions from deforestation to reforestation. In a causal relationship, the Forest Identity relates the carbon sequestered in forests to the changing variables of national or regional forest area, growing stock density per area, biomass per growing stock volume, and(More)
Like cities, forests grow by spreading out or by growing denser. Both inventories taken steadily by a single nation and other inventories gathered recently from many nations by the United Nations confirm the asynchronous effects of changing area and of density or volume per hectare. United States forests spread little after 1953, while growing density per(More)
Barcoding is a standardized approach to identifying animals and plants by minimal sequences of DNA. 1. Why barcode animal and plant species? By harnessing advances in electronics and genetics, barcoding will help many people quickly and cheaply recognize known species and retrieve information about them, and will speed discovery of the millions of species(More)
Living like America means producing and consuming at or near the level of the present top consumer. For material well-being as well as equity, many wish and work for a world in which high economic activity pervades. Others fear environmental harm from the product of global population times the affluence of America. I ask: Has the world ever had uniform(More)