WOA! World Population Awareness

Pollutants whose rates of removal are limited, at least inpart, by biological processes differ from those whose removalrates are not biolimited. Removal may be achieved by degradationinto benign products, dilution to harmless levels, or transferinto sinks. Virtually all organic wastes (e.g., sewage and pulpmill effluents) are biolimited. Examples of pollutants whoseremoval rates are not biolimited include asbestos and radioactivematerials.

Timelapse – Google Earth Engine

The life sciences focus on patterns, processes, and relationships of living organisms

How Many People Should the Earth Support? - EcoFuture

Unknown to most people, species are tuned by natural processes, over immense periods of time, for parents to produce (on average) only a sufficient number of surviving offspring to replace themselves -- meaning two. Ancestral females of our species evolved the ability to have over a dozen children in their short lives -- a necessity under high levels of mortality. Around 20,000 years ago, there was an estimated world population of three million people, which likely had a negligible effect on their surroundings. To ensure tribal survival and integrity, customs and spiritual beliefs of our ancestors became ingrained with the concepts of large families and dominion over all other life.

Glossary - PBS: Public Broadcasting Service

By the year 2050 (within our children’s lifetime), it is anticipated that the burgeoning human population will level off between 11 and 15 billion, driving over 25% of the Earth’s remaining wildlife into extinction (Wilson 1992). The World Wildlife Fund believes one-third of all plant and animal species could be gone within 20 years. We are now losing wildlife at the rate of 75-100 species per day (Wilson 1992), squandering through ignorance and greed a 3.6-billion-year heritage of life on the planet. All these unique life forms are our kin; all of us traceable back over 3.6 billion years of evolutionary history to a common ancestral stock.

19/02/2018 · The life sciences focus on patterns, processes, and relationships of living organisms
EcoFuture (TM) Population and Sustainability - How Many People Should the Earth Support?

The more of us there are, the less planet there is per person

he life sciences focus on patterns, processes, and relationships of living organisms. Life is self-contained, self-sustaining, self-replicating, and evolving, operating according to laws of the physical world, as well as genetic programming. Life scientists use observations, experiments, hypotheses, tests, models, theory, and technology to explore how life works. The study of life ranges over scales from single molecules, through organisms and ecosystems, to the entire biosphere, that is all life on Earth. It examines processes that occur on time scales from the blink of an eye to those that happen over billions of years. Living systems are interconnected and interacting. Although living organisms respond to the physical environment or geosphere, they have also fundamentally changed Earth over evolutionary time. Rapid advances in life sciences are helping to provide biological solutions to societal problems related to food, energy, health, and environment.

Earth is the third planet from the Sun and the only object in the Universe known to harbor life

Glossary of Terms: C - Physical Geography

. Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes. Plants or algae form the lowest level of the food web. At each link upward in a food web, only a small fraction of the matter consumed at the lower level is transferred upward, to produce growth and release energy in cellular respiration at the higher level. Given this inefficiency, there are generally fewer organisms at higher levels of a food web, and there is a limit to the number of organisms that an ecosystem can sustain.

Mobile Phone Access Reaches Three Quarters of …

Biological evolution explains both the unity and the diversity of species and provides a unifying principle for the history and diversity of life on Earth. Biological evolution is supported by extensive scientific evidence ranging from the fossil record to genetic relationships among species. Researchers continue to use new and different techniques, including DNA and protein sequence analyses, to test and further their understanding of evolutionary relationships. Evolution, which is continuous and ongoing, occurs when natural selection acts on the genetic variation in a population and changes the distribution of traits in that population gradually over multiple generations. Natural selection can act more rapidly after sudden changes in conditions, which can lead to the extinction of species. Through natural selection, traits that provide an individual with an advantage to best meet environmental challenges and reproduce are the ones most likely to be passed on to the next generation. Over multiple generations, this process can lead to the emergence of new species. Evolution thus explains both the similarities of genetic material across all species and the multitude of species existing in diverse conditions on Earth—its biodiversity—which humans depend on for natural resources and other benefits to sustain themselves.