Earth system

earth system

Have you heard this term?

The Earth we live on is a complex system of interacting physical, chemical and biological processes. The Earth system can be understood as a set of interlinking and interacting “spheres”. The atmosphere, hydrosphere, biosphere and geosphere (or lithosphere) form the simplest collection, though some would add the cryosphere as a special element dealing with polar regions and processes, and others would add the anthroposphere emphasizing human dimensions and impact on the planet. [1] This system includes the planet’s many natural cycles (e.g. carbon, water, nitrogen, oxygen, phosphorus, sulphur etc.) that support life. [2] Continue reading

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Population growth

Population growth is an issue that transcends age, race, religion and borders. It touches on every environmental issue facing our planet — clean water, energy usage, public lands and wilderness use, endangered species, raw materials and food. 

A growing population in a habitat with diminishing resources is not only detrimental, but is deadly.[1] Right now, world population stands at 7.3 billion and while experts used to believe it would level off at around 8-9 billion, there now seems to be no end in sight. Projections are for 11-12 billion humans by 2100.  population Continue reading