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Collignon favored the efforts made by scientists in many countries to develop a vaccine against COVID-19, but regretted that they have not been successful.

Coal consumption accounts for less than 60 percent of total energy use, Zhang said, adding that energy intensity has improved over the five-year period, with energy per unit of gross domestic product falling 20.3 percent.

Coal producer Shenhua Group and China Guodian Corp, one of the top five State power producers, announced the official merger into a new entity called China Energy Investment Corp. It comes as the country is trying to cut industrial overcapacity and streamline State-owned enterprises.

Colleges and universities have had to allocate part of their budgets to testing for the coronavirus. Cornell University, an Ivy League school, will spend million this semester on its test-and-trace program. It brought back 24,000 people to campus in August.

Combined with carbon and oil sediment the leaks could combust and cause fires when the vehicles were driven at high speeds for long periods of time. Such fires can occur only when the vehicles are being driven.