The People's Republic of China is the second-largest country in the world by land area after Russia and is either the third- or fourth-largest by total area, after Russia, Canada and, depending on the definition of total area, the United States. China's total area is generally stated as being approximately 9,600,000 km2 (3,700,000 sq mi). Specific area figures range from 9,572,900 km2 (3,696,100 sq mi) according to the Encyclopædia Britannica, 9,596,961 km2 (3,705,407 sq mi) according to the UN Demographic Yearbook, to 9,596,961 km2 (3,705,407 sq mi) according to the CIA World Factbook, and 9,640,011 km2 (3,722,029 sq mi) including Aksai Chin and the Trans-Karakoram Tract, which are controlled by China and claimed by India. None of these figures include the 1,000 square kilometres (386.1 sq mi) of territory ceded to China by Tajikistan following the ratification of a Sino-Tajik border agreement in January 2011.
China has the longest combined land border in the world, measuring 22,117 km (13,743 mi) from the mouth of the Yalu River to the Gulf of Tonkin. China borders 14 nations, more than any other country except Russia, which also borders 14. China extends across much of East Asia, bordering Vietnam, Laos, and Burma in Southeast Asia; India, Bhutan, Nepal and Pakistan in South Asia; Afghanistan, Tajikistan, Kyrgyzstan and Kazakhstan in Central Asia; a small section of Russian Altai and Mongolia in Inner Asia; and the Russian Far East and North Korea in Northeast Asia. China's border with India is disputed, and was a key cause of the 1962 Sino-Indian War.
Additionally, China shares maritime boundaries with South Korea, Japan, Vietnam, the Philippines and Taiwan. The PRC and the Republic of China (Taiwan) make mutual claims over each other's territory and the frontier between areas under their respective control is closest near the islands of Kinmen and Matsu, off the Fujian coast, but otherwise run through the Taiwan Strait. The PRC and ROC assert identical claims over the entirety of the Spratly Islands in the South China Sea, and the southernmost extent of these claims reaches James Shoal, which would form a maritime frontier with Malaysia.
Landscape and climate The South China Sea coast at Hainan.The territory of China lies between latitudes 18° and 54° N, and longitudes 73° and 135° E. China's landscapes vary significantly across its vast width. In the east, along the shores of the Yellow Sea and the East China Sea, there are extensive and densely populated alluvial plains, while on the edges of the Inner Mongolian plateau in the north, broad grasslands predominate. Southern China is dominated by hills and low mountain ranges, while the central-east hosts the deltas of China's two major rivers, the Yellow River and the Yangtze River. Other major rivers include the Xi, Mekong, Brahmaputra and Amur. To the west, major mountain ranges, most notably the Himalayas, and high plateaus feature among the more arid landscapes of the north, such as the Taklamakan and the Gobi Desert. The world's highest point, Mt. Everest (8848m), lies on the Sino-Nepalese border. The country's lowest point, and the world's fourth-lowest, is the dried lake bed of Ayding Lake (−154m) in the Turpan Depression.
A major environmental issue in China is the continued expansion of its deserts, particularly the Gobi Desert, which is currently the world's fifth-largest desert. Although barrier tree lines planted since the 1970s have reduced the frequency of sandstorms, prolonged drought and poor agricultural practices have resulted in dust storms plaguing northern China each spring, which then spread to other parts of East Asia, including Korea and Japan. According to China's environmental watchdog, Sepa, China is losing a million acres (4,000 km²) per year to desertification. Water quality, erosion, and pollution control have become important issues in China's relations with other countries. Melting glaciers in the Himalayas could potentially lead to water shortages for hundreds of millions of people.
China's climate is mainly dominated by dry seasons and wet monsoons, which lead to pronounced temperature differences between winter and summer. In the winter, northern winds coming from high-latitude areas are cold and dry; in summer, southern winds from coastal areas at lower latitudes are warm and moist. The climate in China differs from region to region because of the country's highly complex topography.
Biodiversity Main article: Wildlife of China A giant panda, China's most famous endangered and endemic species, at the Wolong National Nature Reserve in Sichuan.China is one of 17 megadiverse countries, lying in two of the world's major ecozones: the Palearctic and the Indomalaya. By one measure, China has over 34,687 species of animals and vascular plants, making it the third-most biodiverse country in the world, after Brazil and Colombia. The country signed the Rio de Janeiro Convention on Biological Diversity on 11 June 1992, and became a party to the convention on 5 January 1993. It later produced a National Biodiversity Strategy and Action Plan, with one revision which was received by the convention on 21 September 2010.
FaunaChina is home to at least 551 species of mammals (the third-highest such number in the world), 1,221 species of birds (eighth), 424 species of reptiles (seventh) and 333 species of amphibians (seventh). China is the most biodiverse country in each category outside of the tropics. Wildlife in China share habitat with and bear acute pressure from the world's largest population of homo sapiens. At least 840 animal species are threatened, vulnerable or in danger of local extinction in China, due mainly to human activity such as habitat destruction, pollution and poaching for food, fur and ingredients for traditional Chinese medicine. Endangered wildlife is protect by law and the country has over 360 nature reserves. The giant panda, the country's most famous endangered and endemic species, lives in protected nature reserves in Sichuan, Gansu and Shaanxi province. A number of other species, such as the South China tiger, Chinese alligator and Pere David's deer, are virtually extinct in the wild and survive only in captive breeding programs.
As the country has grown wealthier in recent years, domestic appetite has grown for wildlife products, leading to a sharp rise in Illegal trading in endangered species such as ivory, rhino horns, shark fins, and threatening wildlife in other countries. Laws prohibiting illegal animal trade are unevenly enforced.
FloraChina has over 32,000 species of vascular plants and is home to a variety of forest types. Cold coniferous forests predominate in the north of the country, supporting animal species such as moose and the Asian black bear, along with over 120 bird species. Moist conifer forests can have thickets of bamboo as an understorey, replaced by rhododendrons in higher montane stands of juniper and yew. Subtropical forests, which dominate central and southern China, support as many as 146,000 species of flora. Tropical and seasonal rainforests, though confined to Yunnan and Hainan Island, contain a quarter of all the animal and plant species found in China.
FungiThe number of species of fungi recorded in China, including lichen-forming species, is not known with precision, but probably exceeds 10,000. More than 2,400 species were listed by the mycologist S.C. Teng in the first modern treatment of Chinese fungi in the English language, which was published in 1996. More than 5,000 species of "higher fungi" – mainly basidiomycetes with some ascomycetes – were reported in 2001 for tropical China alone, and nearly 4,000 species of fungi were reported in 2005 for northwestern China. The exploration and classification of the fungi of China is currently being pursued under the auspices of the Chinese Academy of Sciences, with the production of many volumes in the Flora Fungorum Sinicorum series of publications. The issue of fungal conservation, long overlooked in China, was first addressed in the early 2010s, with pioneer publications evaluating the conservation status of individual species.
Environmental issues Main article: Environment of China See also: Water resources of the People's Republic of China Wind turbines in Xinjiang. The Dabancheng project is Asia's largest wind farm.In recent decades, China has suffered from severe environmental deterioration and pollution. While regulations such as the 1979 Environmental Protection Law are fairly stringent, they are poorly enforced, as they are frequently disregarded by local communities and government officials in favour of rapid economic development. As a result, public protests and riots over environmental issues have become increasingly common.
Environmental campaigners have warned that water pollution is becoming a severe threat to Chinese society. According to the Chinese Ministry of Water Resources, roughly 300 million Chinese do not have access to safe drinking water, and 40% of China's rivers had been polluted by industrial and agricultural waste by late 2011. This crisis is compounded by increasingly severe water shortages, particularly in the north-east of the country. Additionally, numerous major Chinese coastal cities, including Shanghai, are deemed to be highly vulnerable to large-scale flooding.
However, China is the world's leading investor in renewable energy commercialisation, with $52 billion invested in 2011 alone. China produces more wind turbines and solar panels than any other country, and renewable energy projects, such as solar water heating, are widely pursued at the local level. By 2009, over 17% of China's energy was derived from renewable sources – most notably hydroelectric power plants, of which China has a total installed capacity of 197 GW. In 2011, the Chinese government announced plans to invest four trillion yuan (US$618.55 billion) in water infrastructure and desalination projects over a ten-year period, and to complete construction of a flood prevention and anti-drought system by 2020.
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