It was primary forest, undisturbed by the hand of man.
Its species' richness is about half that of the primary forest.
It has lost more than half of its primary forest in the last five years.
Before the early 19th century, most of the Singapore main island was covered by primary forest.
It is found in primary forest below 450 m altitude.
In the last five years, Nigeria lost nearly half of its primary forests.
This left only approximately 1-2% of old secondary and primary forest.
By that time, about two-thirds of the primary forests had been cut.
"We found the most serious pollution I have ever seen over primary forest," he said.
"What we really need are very large areas of primary forest that effectively serve as fire breaks," he says.
Słownik terminów geograficznych
