Writing in The Daily Telegraph, the Prime Minister said the process would not damage the countryside and cause only "very minor change to the landscape".
He added that it has "real potential to drive energy bills down" and insisted that the Government was not "turning our back" on low carbon generation but needed to secure a mix of energy sources.
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John Inge, the Bishop of Worcester, says the death of his wife from cancer at the age of 51 has set him in opposition to the legislation.
A cool weekend ahead but looking dry for many with sunny spells.
Firefighters have warned residents in London that an ongoing blaze could spark the explosion of a gas cylinder.