The environment of China comprises diverse biotas, climates, and geologies. Rapid industrialization, population growth, and lax environmental oversight have caused many environmental issues and large-scale pollution.

China has been officially and conveniently divided into 5 homogeneous physical macro-regions: Eastern China (subdivided into the northeast plain, north plain, and southern hills), Xinqiang-Mongolia, and the Tibetan-highlands. Its physical features are multiples. The eastern and southern half of the country, its seacoast fringed with offshore islands, is a region of fertile lowlands and foothills with most of the agricultural output and human population. The western and northern half of China is a region of sunken basins (Gobi, Taklamakan), rolling plateaus, and towering massifs, including a portion of the highest tableland on earth (Tibetan Plateau) with lower agricultural possibilities and thus, far less populated.

The position of the Chinese government on climate change is contentious. China is the world's current largest emitter of carbon dioxide although not the cumulative largest. China has ratified the Kyoto Protocol, but as a non-Annex I country is not required to limit greenhouse gas emissions under terms of the agreement.

China (ⁱ/ˈtʃaɪnə/; Chinese: 中国; pinyin: Zhōngguó; see also Names of China), officially the People's Republic of China (PRC), is the world's most-populous country, with a population of over 1.3 billion. Covering approximately 9.6 million square kilometres, the East Asian state is the world's second-largest country by land area, and the third- or fourth-largest in total area, depending on the definition of total area.

The People's Republic of China is a single-party state governed by the Communist Party of China. It exercises jurisdiction over 22 provinces, five autonomous regions, four directly controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau). Its capital city is Beijing. The PRC also claims Taiwan—which is controlled by the Republic of China (ROC), a separate political entity—as its 23rd province, a claim controversial due to the complex political status of Taiwan and the unresolved Chinese Civil War. The PRC government denies the legitimacy of the ROC.