I know the pollution is minimal. As for the prices, they have plummeted in America where Fracking is widespread, so you're wrong about that.
*EDIT* http://www.ft.com/cms/s/0/45d75ad0-fe7f-11e2-97dc-00144feabdc0.html
Don't be naive. We have way more taxation than the USA, and a smaller population, so cost per person will be more expensive.
If we're lucky, fracking will cease price rises, but there is absolutely ZERO chance of prices dropping. Just like fuel. Once it is up, people come to expect the cost, so it is accepted on a subconscious level.
Remember when fuel prices were 90p and the thought of going over £1 was painful? Look at where we are now, £1.35-£1.45 per litre, and it continues to increase fortnightly.