Cuisine of Pembrokeshire restaurants. Other breweries include The Pembrokeshire Brewing Company. Cwm Deri Vineyard and Estate at Martletwy, produces country wines, liqueurs and non-alcoholic drinks picked from Pembrokeshire's hedgerows, trees and vines. Princes Gate Spring Water is one of Wales' leading bottled water manufacturers, and is situated on an organic farm at Narberth. The ethos of the brand is "centred on its love of the climate and the precious landscape from which the water is abstracted". Haverfordwest has the main county market. This is held on Saturdays, selling all kinds of meat, poultry and fish in season. Pembroke market is also on a
Pembrokeshire to its proximity to the relatively warm Atlantic Ocean. Inland, average temperatures tend to fall 0.5 °C for each 100 metres increase in height. The air pollution rating of Pembrokeshire is "Good", the lowest rating. The rocks in the county were formed between 600 and 290 million years ago. More recent rock formations were eroded when sea levels rose 80 million years ago, at the end of the Cretaceous Period. Around 60 million years ago, the Pembrokeshire landmass emerged through a combination of uplift and falling sea levels; the youngest rocks, from the Carboniferous Period, contain the Pembrokeshire Coalfield. The