Passage: Livestock are raised throughout the country. Fishing employs 5,000 people and provides over 100,000 tons of seafood each year. Bushmeat, long a staple food for rural Cameroonians, is today a delicacy in the country's urban centres. The commercial bushmeat trade has now surpassed deforestation as the main threat to wildlife in Cameroon.The southern rainforest has vast timber reserves, estimated to cover 37% of Cameroon's total land area. However, large areas of the forest are difficult to reach. Logging, largely handled by foreign-owned firms, provides the government US$60 million a year in taxes (as of 1998), and laws mandate the safe and sustainable exploitation of timber. Nevertheless, in practice, the industry is one of the least regulated in Cameroon.Factory-based industry accounted for an estimated 29.7% of GDP in 2009. More than 75% of Cameroon's industrial strength is located in Douala and Bonabéri. Cameroon possesses substantial mineral resources, but these are not extensively mined (see Mining in Cameroon). Petroleum exploitation has fallen since 1986, but this is still a substantial sector such that dips in prices have a strong effect on the economy. Rapids and waterfalls obstruct the southern rivers, but these sites offer opportunities for hydroelectric development and supply most of Cameroon's energy. The Sanaga River powers the largest hydroelectric station, located at Edéa. The rest of Cameroon's energy comes from oil-powered thermal engines. Much of the country remains without reliable power supplies.Transport in Cameroon is often difficult. Except for the several relatively good toll roads which connect major cities (all of them one-lane) roads are poorly maintained and subject to inclement weather, since only 10% of the roadways are tarred. Roadblocks often serve little other purpose than to allow police and gendarmes to collect bribes from travellers. Road banditry has long hampered transport along the eastern and western borders, and since 2005, the problem has intensified in the east as...

Question: Where is the biggest hydroelectric station?
Edéa