Hong Kong is located on China's south coast, 60 km (37 mi) east of Macau on the opposite side of the Pearl River Delta. It is surrounded by the South China Sea on the east, south, and west, and borders the city of Shenzhen in Guangdong Province to the north over the Sham Chun River. The territory's 1,104 km2 (426 sq mi) land area consists primarily of Hong Kong Island, Lantau Island, Kowloon Peninsula and the New Territories as well as some 260 other islands.
As much of Hong Kong's terrain is hilly to mountainous with steep slopes, less than 25% of the territory's landmass is developed, and about 40% of the remaining land area is reserved as country parks and nature reserves. Most of the territory's urban development exists on Kowloon peninsula, along the northern edge of Hong Kong Island and in scattered settlements throughout the New Territories. The highest elevation in the territory is at Tai Mo Shan, at a height of 958 metres (3,140 ft) above sea level. Hong Kong's long, irregular and curvaceous coastline also affords the territory with many bays, rivers and beaches.
Despite Hong Kong's reputation of being intensely urbanised, the territory has made much effort to promote a green environment, and recent growing public concern has prompted the severe restriction of further land reclamation from Victoria Harbour. Awareness of the environment is growing as Hong Kong suffers from increasing pollution compounded by its geography and tall buildings. Approximately 80% of the city's smog originates from other parts of the Pearl River Delta.
Situated just south of the Tropic of Cancer, Hong Kong's climate is humid subtropical climate (Köppen climate classification Cwa). Summer is hot and humid with occasional showers and thunderstorms, and warm air coming from the southwest. It is also the time when typhoons are most likely, sometimes resulting in flooding or landslides. Winter weather usually starts sunny and becomes cloudier towards February, with the occasional cold front bringing strong, cooling winds from the north. The most pleasant seasons are spring, although changeable, and autumn, which is generally sunny and dry. Hong Kong averages 1,948 hours of sunshine per year, while the highest and lowest ever recorded temperatures at the Hong Kong Observatory are 36.1 °C (97.0 °F) and 0.0 °C (32.0 °F), respectively.
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