The percentages of electricity derived from renewable sources in the each of the seven years from 1997 to 2003 are as follows:
|Overall||Sources eligible |
for Renewable Obligation
Digest of UK Energy Statistics 2003 and Digests for earlier years.
This overall renewables percentage includes both biodegradable and non-biodegradable wastes and large scale hydro. The amount of electricity produced using hydro sources varies from year to year depending on the rainfall. Low precipitation during the winters of 2000–01 and 2002–03 resulted in low hydro output during 2001 and 2003 hence the fall in generation from renewables in those years.
Source eligible for the Renewables Obligation are biofuels (including the co-firing of biomass with fossil fuel), onshore and offshore wind, all new hydro, refurbished hydro up to 20 MW (commissioned before 1990), solar photovoltaics and wave and tidal technologies. As more and more onshore and offshore wind projects are commissioned, we can expect to see substantial growth in the amount of renewables electricity output over the coming years.