(Hydro
Atmo
Event
Geo
Bio
1. What sphere caused the event?
2. What are the effects of the event on one or more spheres?
3. What is the global implication of the event?
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(Hydro
Atmo
Event
Geo
Bio
1. What sphere caused the event?
2. What are the effects of the event on one or more spheres?
3. What is the global implication of the event?
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1. the atmosphere, which contains all of the planet's air. These spheres are closely connected. For example, many birds (biosphere) fly through the air (atmosphere), while water (hydrosphere) often flows through the soil (lithosphere).
2. An event can cause changes to occur in one or more of the spheres, and/or an event can be the effect of changes in one or more of Earth's four spheres. This two-way cause and effect relationship between an event and a sphere is called an interaction. Interactions also occur among the spheres.
3. The OECD defines global events as events of a limited duration that have a global reach, require significant public investment and have an impact on the population and built environment.