Pembrokeshire Pembrokeshire Pembrokeshire (, , or ; ) is a county in the southwest of Wales. It is bordered by Carmarthenshire to the east, Ceredigion to the northeast, and the sea everywhere else. The county is home to Pembrokeshire Coast National Park, the only national park in the United Kingdom established primarily because of the coastline; the Park occupies more than a third of the area of the county and includes the Preseli Hills in the north as well as the Pembrokeshire Coast Path. Industry is nowadays focused on agriculture (86 per cent of land use), oil and gas, and tourism;
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