Greenhouse gases 'to rise by 52%'

Global greenhouse gas emissions will rise by 52% by 2030, unless the world takes action to reduce energy consumption, a study has warned.

The prediction comes from the latest annual World Energy Outlook report from the International Energy Agency (IEA).

It says that under current consumption trends, energy demand will also rise by more than 50% over the next 25 years.

The IEA adds that oil prices will "substantially" rise unless there is extra investment in oil facilities.