Only pumped storage hydro schemes currently have any role and their contribution to overall use is small.
In its new forecast, the cabinet office said it expected rising business investment to continue to make a big contribution to overall economic growth.
"These technologies on a device-by-device basis, or even a house-by-house basis, are not a significant additional contribution to overall power consumption," he says.
While the index was still above the 50 mark that separates growth from contraction, economists said it suggested manufacturers would make little contribution to overall economic growth in the UK in the coming months.
According to Dirk Pilat of the OECD, services that use ICT intensively raised their contribution to overall labour productivity growth from 0.4% a year in the early 1990s to 0.9% a year in the period from 1996 to 2001.
So far, he says, R&D's contribution to overall growth is "minuscule", and where multinationals, such as Cisco Systems and Nortel, have contracted work out to Indian services firms it has been in upgrading old products, not developing new lines.
Mrs. Hunt said the wind turbine near the main entrance makes a great calling card, but that the area's variable and generally modest winds have limited the turbine's contribution to overall energy production.
Thus, the driver's contribution to overall vehicle safety must be implemented in electronic systems.
Capacity of each generating unit is paid according to its effective contribution to overall system reliability.
Space and associations with herbs had a minor contribution to overall variation.
Conservancies are an important livelihood activity for those who participate and can make a significant contribution to overall household income.
