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Coal companies in Shanxi, a key coal producing province in China, have made remarkable progress in shifting from heavily polluting coal mining to clean and efficient use of the nonrenewable resources.

Collins told fellow senators Friday that Christine Blasey Ford's dramatic testimony last week describing Kavanaugh's alleged 1982 assault was "sincere, painful and compelling." But she said the FBI had found no corroborating evidence from witnesses whose names Ford had provided.

Complicated terrain, steep slopes and strong winds have made the fire fighting work extremely challenging, according to the local fire department.

Coal output reached 3.68 billion tonnes in 2018, 115 times of only 32 million tonnes 70 years ago, according to Huang Yuzhi, head of the National Coal Mine Safety Administration.

Compared with second-generation satellites, third-generation models feature higher accuracy and stability, a clearer signal and more state-of-the-art technologies such as inter-satellite links, satellite-based augmentation and global emergency search capability, said Chen Zhonggui, chief designer of the third-generation satellite at China Academy of Space Technology.