Electricity in sight

The quote has come in and is more than 5000 pounds lower than we thought. So we have decided to connect to the grid. It means we won't have to buy a battery bank, back up generator and inverter. It's good news for the budget although not quite as eco as we had planned.
Ann is now toying with the idea of a conventional fridge rather than a cool box and an electric cooker. It would be cheaper.... Why is it so expensive to be green ???