In the fourth report undertaken with research partner, Connection Research, Fujitsu surveyed 638 organisations in four countries -- the US, UK, Australia and India -- looking at areas such as Green IT lifecycle, end-user efficiencies, enterprise and data centre efficiencies, the use of IT in carbon reduction and measurement and monitoring. The financial services industry is one of the largest users of IT.

According to the findings, the UK leads the US for Green IT initiatives, ranking above the cross-industry average. Australia is on average and India is below average.

"One interesting aspect [of the findings] is the size of the companies which are doing well," Fujitsu global executive director of sustainability, Alison Rowe, said. "It is quite different in each of the regions.

"In Australia and India, the best performing companies are those with 5000-plus employees. But in the UK, it was companies with 100-500 staff and in the US it was those with 500-1000 employees. It is not always the large organisations that are leading the pack, even though the scale of benefits within the large organisation is much greater."