My Lords, Amendment 3 in my name is also in the names of the noble Baroness, Lady Bakewell of Hardington Mandeville, and the noble Baroness, Lady Jones of Moulsecoomb, to whom I am grateful. I declare my environmental and conservation interests as on the register, and it is also relevant—although not registerable—that I am a member of Buglife, the invertebrate NGO. Perhaps one of the flies which have been annoying my noble friend Lord Deben is an agent.
Artificial lights disrupt the world’s ecosystems, human health and, I submit, society in general. Most of the earth’s population is affected by light pollution, as 80% live under skyglow, and very few in the UK can experience a natural night sky from where they live. Those few who do see a night sky naturally without light pollution are amazed by what they see on a clear night.
Light pollution is increasing from a variety of sources, including residences, public infrastructure such as lighting along motorways, and industrial activity such as energy infrastructure. Ironically, the rapid switch to LEDs is contributing to the installation of brighter lights, in places increasing light pollution and missing the opportunity to reduce it. That is ironic because LED is much better for the environment if used appropriately.
The 25-year plan for the environment states:
“We must ensure that noise and light pollution are managed effectively.”
However, no indication of how existing light pollution will be reduced has been proposed by Her Majesty’s Government. As far as I can see, the Environment Bill does not currently offer a suitable location for this
form of pollution to be addressed. The amendment would ensure that the Government set out how they will reduce light pollution levels.
In Committee, 12 noble Lords spoke in favour of my very similar amendment on light pollution, covering a range of issues including the impact on invertebrates, astronomy, human health and bats, among other things. I was extremely grateful for their powerful arguments and I am extremely grateful for the many who support today’s amendment in the Chamber and elsewhere. Noble Lords shared their own experience of light pollution and provided compelling reasons why this issue should be included in the Bill.
In his reply, my noble friend the Minister did not seem to acknowledge the overwhelming evidence of environmental and health damage. His response, as drafted, was disappointingly focused rather narrowly on uncertainty about whether it has been proved that light pollution is the main driver of insect loss. That is one of the main reasons why I tabled this amendment: because I do not think we had a proper discussion of some of the other harmful effects of light pollution. Perhaps his department was unaware of the recent science review “Light pollution is a driver of insect declines”, published by Owens and others in 2020. Since that debate, many noble Lords may have seen that newly published evidence has confirmed that light pollution has a negative effect on local moth populations. The response given in Committee also did not address the other issues raised in the debate or recognise the cross-departmental benefits that reducing light pollution would bring.
In recent years, evidence of the impacts of light pollution on species and ecosystems has grown and consolidated. Increased artificial light at night is now directly linked to measurable negative impacts on energy consumption, human health, and wildlife such as bats, birds, insects, reptiles, amphibians, mammals and plants. As I mentioned in Committee, noble Lords who saw the David Attenborough documentary will have seen turtles, instead of going towards the moon as they go back to sea, going back to some taverna on a Greek shore. This resulted in many of their deaths.
Unnecessary artificial light increases financial costs and contributes to greenhouse emissions. I submit that light pollution should be treated with the same disdain with which we treat other forms of pollution. As I mentioned, recent studies from Germany suggest that a third of insects attracted to street lights and other fixed-light sources will die. This results in the death of an estimated 100 billion insects in Germany every summer. As many noble Lords will recognise, insects are an incredibly important part of our whole ecosystem.
My amendment aims to set a commitment to act on matters relating to light pollution that are currently omitted from the Bill and would ensure that the Government must produce targets to reduce levels of light pollution in England. I will not go through all the examples I have written down, because I think that many people know them for themselves; besides which, we are a little pressed for time. However, speaking as a trustee of the Bat Conservation Trust, I know that artificial lighting can cause many problems for bats, including disrupting their roosting and feeding behaviour and their movement through the landscape. In the
worst cases, that can directly harm these protected species. Even hedgehogs have been shown to avoid lighting, restricting their movements in areas of high artificial light.
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Light pollution has been identified as a serious threat in many areas biodiversity areas, but the amendment is not just for the birds and the bees. Lighting is estimated to account for 15% of global electricity consumption and 5% of global greenhouse gas emissions. Social inequalities in exposure to light pollution occur across urban and rural settings. Light pollution is negatively impacting astronomy and our ability to observe the stars. The British Astronomical Association estimates that 90% of the UK population are unable to see the Milky Way from where they live.
The Environment Agency’s state of the urban environment report acknowledges that light pollution comes with urban life and identifies an uneven distribution of the natural environment across all sectors of society, leading to issues of environmental justice. Humans have evolved to rely on the cycle of night and day to govern our physiology, and evidence suggests that light exposure at the wrong time has profound impacts on human circadian rhythm, affecting physical and mental functions. Studies have also shown links between artificial light at night and low melatonin levels and disrupted circadian cycles with heart disease, diabetes, depression and cancer, particularly breast and prostate cancers.
To me, the evidence is clear that light pollution has a significant impact on the normal activity of invertebrates, birds, bats, plants and humans. These impacts are more than sufficient to require action. It would be a failure not to address this before we have the long-term data. Doing so would go against the Government’s draft environmental principles, in particular the precautionary principle but also the prevention and rectification at source principles. As it is, there is no official report for the UK on light pollution levels. However, and distinct from the previous debate in which we talked about soil and how difficult it is to measure soils, measuring light pollution is simple to do. Satellite images can be used to establish pollution levels, and the CPRE has developed a nine-band classification system that could form the basis of monitoring change.
My amendment is designed to provide clarity on how the Government will reduce the impact of light pollution on nature and people’s enjoyment of it. I am very grateful to my noble friend the Minister. We have had some very good discussions on this during the Recess. I know he understands it and I recognise that many noble Lords regard this as a serious matter. Perhaps, as the noble Earl, Lord Devon, said, it is not of the same magnitude as soil, and it is possible that we cannot keep adding more and more to the list of priorities, but I think that national targets should be set to include, at a minimum, no net increase in light pollution, with an ambition to reduce existing levels.
I have received a certain amount of support on this, but I will wait to hear what my noble friend the Minister has to say. If he can give me ample reassurances, we might not have to test the electronic voting system again—but no promises yet.