The ILO estimates that nearly 6 million people are directly employed by the petroleum industry and over ten times that number of jobs are indirectly created by the industry. Employment opportunities for women in the petroleum industry are increasing, but from a very low base. This may be because of harsh working conditions in the industry: long hours work, especially in oil production; increasing amounts of work round the clock, in difficult, remote areas ; scheduling of shifts particularly offshore when rotation patterns are constrained by transport schedules and limits on accommodation. The petroleum industry faces the shortage of skilled workers.