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According to the Finnish national forest inventories , the total area of peatlands decreased from 9.7 to 8.9 million hectares during the period 1951-1994 , mainly because thin-peated peatlands had changed into drained mineral soils during that period . The absolute area for biotech crop acreage in developing countries grew 7.2 million hectares , more than a million hectares above the 6.1 million hectare growth in the industrialized world . The expansion of coca cultivation , production , and trafficking in Peru , Bolivia , and Colombia has resulted in the destruction of , at an absolute minimum , 2.4 million hectares of fragile tropical forest - - an area the size of El Salvador - - in the Andean region over the last 20 years . The Tonle Sap is the largest freshwater lake of Southeast Asia , covering 27,000 hectares during the dry season and 150,000 hectares during the rainy season . The ANBG occupies 90 hectares on Black Mountain in Canberra and provides technical advice and assistance to the Jervis Bay Botanic Gardens , which is administratively incorporated into the Jervis Bay National Park . The ANBG occupies 90 hectares on the lower slopes of Black Mountain in Canberra and 80 hectares at Jervis Bay . In order to achieve sustainable management of land , the federal government announced that the area of new land consumed for housing , commercial sites , and transport must be reduced from the 120 hectares per day used on average during the past ten years to 30 hectares per day by 2020 . Worldwide , deforestation continues at an alarming rate , about 13 million hectares per year , an area the size of Greece or Nicaragua . That is why , the Executive gave a commitment , in the draft Programme for Government , to extend the area of woodland by 700 hectares during 2001/2002 and to manage our woodlands sustainably . Marble and other precious materials were imported from Greece , Egypt and parts of Asia , while inhabitants of the area were evicted to amass the 80 hectares on which the residence sits . Note that the world average has decreased from 0.25 hectares per capita in the 1950s to 0.15 hectares per capita in the 1990s , which may be critical for a sustainable level in the future . The second to last column gives the percentage of the total observations that were from Texas and the last column shows the number of hectares of monarchs measured at the overwintering sites the following winter . Hundreds of hectares of Alfa and oak trees were destroyed by a fire last week in the province of Taza , Northeastern Morocco . But given this scenario , and knowing that it is relatively common to find 106 hectares of a plant host planted in a region for some cereals , you should wonder why resistance gene pyramids do n't break down immediately since most " pyramids " include only 2 or 3 resistance genes . Since the U.S. has been so tenacious in pursuing this weapons of mass destruction subject in the Middle East , we wonder if you intend to clean and decontaminate San Jose Island , which was contaminated by the forces of Canada , the U.K. and the U.S. during the Second World War , and likewise we still have pending the subject of the contamination of some 5,000 hectares on the shores of the Canal that were firing ranges for the U.S ., as well . Yet the average consumption per head of population is equivalent to about 2.3 hectares per person . " Approximately 47 million hectares of planted forests have survived in China so far , making the figure the largest in the world .