August and September. During the winter (November to March), the northeast experiences steady rain, while the central and southern parts of the island are mostly sunny. Due to climate change, the average temperature in Taiwan has risen in the last 100 years, which is twice the worldwide temperature rise. The goal of the Taiwanese government is to cut carbon emissions by 20 per cent in 2030 compared to 2005 levels, and by 50 per cent in 2050 compared to 2005 levels. Carbon emissions increased by 0.92 per cent between 2005 and 2016. Geology The island of Taiwan lies in a complex tectonic area between the Yangtze Plate to the west and north, the Okinawa Plate on the north-east, and the Philippine Mobile Belt on the east and south. The upper part of the crust on the island is primarily made up of a series of terranes, mostly old island arcs which have been forced together by the collision of the forerunners of the Eurasian Plate and the Philippine Sea Plate. These have been further uplifted as a result of the detachment of a portion of the Eurasian Plate as it was subducted beneath remnants of the Philippine Sea Plate, a process which left the crust under Taiwan more buoyant. The east and south of Taiwan are a complex system of belts formed by, and part of the zone of, active collision between the North Luzon Trough portion of the Luzon Volcanic Arc and South China, where accreted portions of the Luzon Arc and Luzon forearc form the eastern Coastal Range and parallel inland Longitudinal Valley of Taiwan, respectively. The major seismic faults in Taiwan correspond to the various suture zones between the various terranes. These have produced major quakes throughout the history of the island. On 21 September 1999, a 7.3 quake known as the "921 earthquake" killed more than 2,400 people. The seismic hazard map for Taiwan by the USGS shows 9/10 of the island at the highest rating (most hazardous). Political and legal status The political and legal statuses of Taiwan are contentious issues. The People's Republic of China (PRC) claims that Taiwan is Chinese territory and that the PRC replaced the ROC government in 1949, becoming the sole legal government of China. The ROC, however, has its own currency, widely accepted passport, postage stamps, internet TLD, armed forces and constitution with an independently elected president. It has