How many percent of the world's land is occupied by forests?
Forests cover 31 percent of the world's land surface, just over 4 billion hectares. (One hectare = 2.47 acres.) This is down from the pre-industrial area of 5.9 billion hectares.
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What was the reason to build Canberra for Australian capital, rather than selecting one of the existing large cities?
safe location far from the sea
wish of the Indigenous Australians
low land price
dispute between Sydney and Melbourne
Where in the world does slavery still occur at the largest scale?
in Sri Lanka
in Saudi Arabia
In which major European city, there is a volcano that may soon erupt?