Scotland

It's a confusing time in the north Atlantic with an international controversy brewing over the humble mackerel. Some are comparing it to last century's 'cod wars', when the UK and Iceland went to battle over access to cod fishing.

Mackerel, an exquisitely beautiful fish related to the tunas, is relatively plentiful, occurs in big shoals, and can be caught quite 'cleanly' by seine nets or handlines. For these reasons (as well as the health benefits of it being an oily fish), it has become a firm favourite for those seeking a sustainable option.

It's worth stopping to think about the true price of the salmon you eat. And there's quite a lot to think about.

Salmon is one of the biggest international seafood commodities, and in the UK it's easily one of the most consumed and most conspicuous species in our supermarkets and restaurants. But the vast majority of the salmon you'll find on shelves or plates these days has been farmed rather than fished. Partly that’s because there's hardly any wild Atlantic salmon left, but it's also because salmon's popularity has grown and it has gone from being a delicacy to become more of an everyday food in the past few decades.

Avedore CHP plant in Denmark

Remember how we said last month that industrial combined heat and power (CHP) plants could save us money, increase our energy security and help slow climate change?

Well, we've just heard that plans are afoot for just such a plant in Scotland. The Tullis Russell paper mill plans to reduce its annual carbon emissions by around 250,000 tonnes a year by switching to biomass CHP for its electricity and steam.

Anemones on a sea mount - not known for their migratory habits

The weather forecast was ominous as we departed Aberdeen harbour, gales and high winds were ahead of us. But with the wind behind us, we've had a good night's sailing.