Ecological Trends
Humanity overdrew the natural capital it depends on by 23 percent in 2002.
Between 2000 and 2005, global forested area shrunk by more than 36 million hectares (just under 1 percent of the total forested area).
As of late 2005, an estimated 20 percent of the world’s coral reefs had been “effectively destroyed,” while 50 percent are threatened in the short or long term.
Twenty percent of the world’s mangrove forests have been destroyed over the past 25 years.
Twelve percent of all bird species were categorized as “threatened” in 2005.
Three percent of all plant species are currently threatened with extinction.
