in positive changes, as the heavy winds and cool summers in the Faroe Islands did not allow the growth of trees from other regions in the world. The imported trees are used ornamentally, as curtains against wind, and for fighting erosion caused by storms and grazing in the Faroe Islands. Fauna Among the most notable animals in the archipelago are austral parakeets, gulls, guanacos, foxes, kingfishers, condors, king penguins, owls, and firecrown hummingbirds. Isla Grande de Tierra del Fuego is home to the southernmost known lizard in the World, the Liolaemus magellanicus. North American beavers, introduced during the 1940s, have proliferated and caused considerable damage to the island forests. The governments have established a wide-reaching program to trap and kill beavers in Tierra del Fuego. Like the mainland of Chile and Argentina to the north, this archipelago boasts some of the finest trout fishing in the world. Sea-run brown trout often exceed , particularly in rivers such as the Rio Grande and the San Pablo, and in the Lago Fagnano. Much of this water is privately owned, with catch and release and fly fishing only. Waters adjacent to Tierra del Fuego are very rich in cetacean diversity. Sightings of southern right whales in Tierra del Fuego have increased in the 2000s, humpbacks, and some others such as blue whales, southern fins, southern seis, and southern minkes. Beagle Channel is a prominent area to watch rare, endemic dolphins, and the less-studied pygmy right whales. Pinnipeds inhabiting the areas include South American sea lions (Otaria flavescens), South American fur seals (Arctophoca australis), the carnivorous and seal-eating leopard seals (Hydrurga leptonyx), and gigantic southern elephant seals (Mirounga leonine). Economy Today, the main economic activities of the archipelago are fishing, extraction of natural gas and oil, sheep farming, and ecotourism. Tourism is gaining in importance and becoming increasingly important as it attracts numerous upmarket visitors. Much of the tourism is based on "southernmost" claims: for example, both Ushuaia and Puerto Williams claim to be the "southernmost city in the world". On the Argentine side of Tierra del Fuego, the government has promoted the establishment of several electronic companies via tributary exemptions, particularly in the city of Río Grande. Energy production is a crucial economic activity. On the Argentine side of Tierra del Fuego during the 2005 to 2010 period, petroleum and natural gas extraction contributed to 20% of the region's economic output. Tierra del