And,it said, more than twenty thousand people are taken to hospital emergency rooms for treatment of health problems linked to the gas.

VOA: special.2010.02.02

But a drop in oxygen levels can cause a health emergency in people with heart or lung problems.

VOA: special.2009.07.14

The RCN has highlighted giving nurses more power as a way of solving emergency care problems.

BBC: NEWS | UK | Wales | 'Stressed nurses' A&E action plan

"I think that we have had some problems in our emergency departments for some time, " she said.

BBC: Antrim Area Hospital A&E failing to meet targets

Universities have been forced to bail out students with emergency funding - with particular problems for mature students with children of their own.

BBC: Next year's student loans delayed