Humans change things. They have been doing this in measurable ways within individual ecosystems and globally for the last 14,000 years. More humans means more change. This space is dedicated to helping you discover how the basic 'environmental systems' that all living things depend upon have been and are being changed by human activity.
What is the Cryosphere?
What is the Hydrosphere?
What is the Lithosphere?
What is the Biosphere?
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