Climate change is just one of the many symptoms exhibited by a planet under pressure from human activities. "Global environmental change, which includes climate change, threatens to irreversibly alter our planet," says Kevin Noone, Executive Director of the International Geosphere-Biosphere Programme (IGBP).
Global studies by IGBP show that human-driven environmental changes are affecting many parts of the Earth’s system, in addition to its climate. For example:
- Half of Earth’s land surface is now domesticated for direct human use.
- 75 percent of the world’s fisheries are fully or over-exploited.
- The composition of today´s atmosphere is well outside the range of natural variability the Earth has maintained over the last 650,000 years.
- The Earth is now in the midst of its sixth great extinction event.
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