ESS102H1 Lecture : lecture 1

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Global environmental change is both natural and human induced, of physical, chemical and biological interactions, vary both spatially and over a wide range of time. Humans are increasingly aware that their environment is changing. What we need to assess the extent of current global change: right tool, context: an understanding of how global processes and earth systems work. understanding how much the globe has already changed (recently and in the geologic. Complex web of physical/chemical/biological interaction in the atmosphere, the biosphere, the past) hydrosphere, and the lithosphere. Rate is important includes gradual processes over geologic time as well as rapid and/or catastrophic events. Context global environmental change is not a recent phenomenon. Humans have only recently become significant agents of global change. A system is any assemblage or combination of interacting components (for example the human body) The earth system has 4 major interacting parts, with flows of matter and energy between them: biosphere, hydrosphere, atmosphere, lithosphere.

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