Reuters: China’s worsening coal shortages have exerted unprecedented pressure on Shanxi, the country’s top coal-producing region, to push output beyond approved levels and worsening environmental strains, official media reported on Tuesday. Demand from users who normally get their coal from Shanxi is expected to exceed its output by more than 200 million tonnes this year, despite the region’s all-out efforts to boost production, the official China Securities Journal said. Shanxi …