My Lords, I shall speak to Amendment 280 in the name of the noble Baroness, Lady McIntosh, and the noble Lord, Lord Teverson. This is a very interesting area and it is important that we continue to carefully research the impact of individual wind farms, as well as—perhaps more importantly, as the noble Lord, Lord Teverson, mentioned—their cumulative effect on many species, from benthic invertebrates through sand eels and fish to birds and the larger sea mammals. I shall start by highlighting the approach taken on this subject by the National Audubon Society, the equivalent of the RSPB in the USA. It says, and I gather that many scientists here agree, that climate change is the biggest enemy of our avian population. As wind farms are one of the best weapons in our arsenal to fight climate change, we must be careful about putting too many barriers in the way of their development, albeit with a clear understanding of their effects and what mitigation could be put in place.
The noble Baroness, Lady McIntosh, is right that research on the effect of offshore wind farms on marine mammals and cetaceans is still, shall we say, in its infancy. However, the research on wind farms and their effects on birds is reasonably well advanced, so I shall focus on that. The Scottish Government, through their all-encompassing research programme on marine energy, ScotMER, have taken a very good strategic approach to this issue, working with research institutions, notably the UK’s CEH, which I happen to chair, alongside some important private-sector players; the Swedish company Vattenfall and the Danish company Ørsted being two good examples.
On the question of where offshore windfarms should be situated, we are pretty well aware of their effects during the seabird breeding season. By putting GPS tags on birds during the breeding season, we now know precisely where wind farms should not go, which is a very good start. The winter season is more difficult, however. GPS tags are not yet light enough or durable enough to provide reliable long-term information during this highly sensitive period. I call it a sensitive period because most seabird mortality happens during winter, and winter deaths are the critical factor in the survival of their colonies—more so, it seems, than their breeding success.
The main problem encountered during winter by our seabirds is the lack of food. The main food they eat are sand eels, which, as their name indicates, live in the underwater sands of the North Sea, let us say, where most wind farms are. Maybe the abundance of sand eels is affected by the sands themselves being disturbed by the building of wind farms and, more importantly perhaps, by the submersion of miles and miles of cable. But we do not yet have the data on that.
However, I should point out at this stage that, where you have wind farms, you will probably not get fishing boats, because of the likelihood of drift and getting the nets entangled in turbine towers. In the long term—we do not yet know—by building wind farms, we might well be creating the equivalent of what should be happening in our marine protected areas in terms of no-go fishing areas, where many species, including sand eels, could be given a real chance to flourish. Wind farms could be the best thing for both our abundance of fish and our birds. Who knows?
Coming back to the existence of offshore wind farms and their effect on birds, it is notable that the worst effects are on high-flying birds such as gannets and kittiwakes, whereas low-flying birds such as razorbills, guillemots and shearwaters tend not to be too troubled by them. Kittiwakes seem to be the worst affected species, and it is good that Ørsted, for instance, is building artificial kittiwake nesting sites at the Hornsea Three development off the Yorkshire coast by way of mitigation.
Returning to the amendment, I am not sure that its emphasis is right. Private companies already have to carry out basic environmental monitoring exercises both before and after their developments. As I have said, some of them go very much further, with Vattenfall actually paying for a PhD student to assist in the ScotMER research project I mentioned just now.
In many ways, having private companies judge the environmental viability of their own project is not as good as getting them to contribute to more strategic research into the overall cumulative effects of offshore wind farms and the best ways of mitigating their effects. The current view is that having lots of small turbines placed close to each other is more damaging than having modern large turbines placed a kilometre or so apart, but we do not yet really know. Is it best to leave 2-kilometre-wide corridors through wind farms or does this only confuse the situation? Further research has found that if you paint one blade of each turbine all black, the birds seem to keep away—but again, more data is needed on this.
Coming back to the kittiwake issue, and on the subject of strategic planning, there is a big question as to whether we should be thinking of the kittiwake population as a local problem or, as they do in the United States, thinking of the kittiwake population as a whole. In other words, if a colony on the Yorkshire coast is threatened, maybe it would be better to encourage more kittiwake growth in Wales or Cornwall, and not in Yorkshire. We might have more overall success that way. Again, more research is going on in those fields. If overwintering is the main problem, as I said, we should definitely combine our research strategies, not only with all the UK nations involved but also, as mentioned by the noble Baroness, Lady McIntosh, with other countries such as Iceland, Norway, Denmark, et cetera.
In conclusion, the problem is a very good one to raise in the context of this Bill. It is an important issue and I thank the noble Baroness for raising it, but I am not sure that the amendment as it stands quite puts its finger on the right solution.