The interim decision is subject to conditions and agreed measures to reduce the impact of traffic on local roads. An estimated 7,000 jobs will be created by the £380m scheme on 400 acres (240 hectares) at Hams Hall near Coleshill on a former power station site.
Mr Gummer said that substantial economic and employment benefits which should come from the proposed development were an important factor in deciding on Hams Hall.
'The proposed development would also help meet environmental aims by encouraging the transfer of long distance freight from road to rail.'
The inspector said: 'The need is urgent and there is no clear prospect of it being met elsewhere.'
The Secretary of State considers that the degree of need and the advantages identified by the inspector outweigh any harm or disadvantages. He also considers that they constitute the very special circumstances necessary to warrant allowing the development of the Green Belt providing the traffic measures are agreed.