By Laura Husband

Lake Tanganyika in East Africa is at its hottest for 1,500 years and is likely to affect the fish supply of those living in the four countries that surround it, a new study has found.

The study carried out by a team of geologists from Brown University, US took samples from the lake bed to measure its temperature.

Geologists drilled into Lake Tanganyika to measure the surface temperature over 1,500 years

The temperature increased rapidly in the 20th Century and today the surface temperature is a record 26 degrees Celsius. The warming has already affected the ecosystem and the number of fish.

“Our data shows a consistent relationship between the lake surface temperature and productivity including the number of fish,” said geologist and lead author of the study Jessica Tierney.

As the lake’s surface temperature continues to rise, fish productivity is expected to decline and this will affect the fishing industry in the region, explained Tierney.

Lake Tanganyika is one of the richest freshwater ecosystems in the world. The lake divides into levels naturally: the top 100 metres have most of the animal species while the water closest to the lake bed has less oxygen but more nutrients. The ecosystem relies on the two types of water mixing together.

Tierney found that as the lake warms the two levels cannot mix together. This means fish will struggle to get nutrients from the waterbed.

People throughout South-Central Africa depend on Lake Tanganyika’s fish, said geology professor Andrew Cohen.

The climate change models, if accurate, show the warming in the region will only get worse, explained geology professor James Russell.

By Tiffany Stecker

Plastic bottled water is losing its appeal as city-wide efforts encourage people to twist on the tap.

In the past few years, tap water campaigns have circled the world, from Tokyo to Toronto, calling people to ditch plastic bottles and have faith in the purity of their local treatment plant.

Picture credit: saw2th on Flickr

In Bundanoon, Australia, a town of approximately 2,500 people, the sale of plastic bottled water was banned in September last year – theirs was the first local government to do so, ever. Venice, a city literally built on water, launched a glossy campaign in the summer to promote tap water and reduce the amount of rubbish along its canals. In October The Greater London Authority, along with Thames Water and Transport for London announced the installation of water fountains at the Hammersmith bus station and Tower Bridge museum.

While the drinking water movement has its origins in grassroots environmentalism, tap water campaigns in the United Kingdom are of a different nature: the leaders are private water companies who vie for a profit, just like bottled water companies.

“It’s kind of a weird contradiction, the fact that water is privatised in Britain,” says Richard Girard, head researcher with the Canadian think tank Polaris Institute. Girard wrote an article that warned: “Don’t be fooled by strange bedfellows.”

“Private water delivery companies see bottled water as a direct competitor for their product, tap water,” he wrote. “It is not surprising, then, that the pro-tap water movement in the UK has achieved such prominence - with the public relations teams from several private water companies working on the issue, and the use of the print media for promotion, it is bound to achieve some.”

There is an indication that preference for bottled water is decreasing in the UK. A report from market research group Zenith International released last March found that 2008 sales of bottled water fell by 5.5 per cent in volume and 4 per cent in retail value. The Drinking Water Inspectorate (DWI), which regulates mains-fed water quality, commissioned a survey in November 2008 to compare attitudes towards tap water to results from a similar survey completed in 1995. It found that the number of people drinking bottled water has remained fairly static between the two phases, if not with slightly fewer consumers of bottled water in 2008 compared with 1995.

However, this decrease may be attributed to consumers simply switching to beverages other than water, rather than a preference for tap, according to Zenith. The group also projects bottled water consumption to rise in the UK to 2.5m litres - a 500,000 unit increase - by 2015.

While lobbyists from both camps accuse the other of lower quality, the reality is that one type is not held at a higher standard, but at a different standard.

Tap water quality is regulated by the DWI in England, Wales and Northern Ireland. Bottled water is approved by the Food Standards Agency (FSA) in three different categories: natural mineral water, spring water and bottled drinking water.

Natural mineral water, the most expensive form of bottled water, must be recognised by establishing the composition of water in relation to the rock strata through which it passed, and the aquifer in which it accumulated. Mineral and microbe composition must be strictly monitored to avoid variance. There is also no legal limit for sodium content in mineral water, which is not the case for the less expensive types. Despite its premium price tag, natural mineral water is also the most popular type of water, says Jo Jacobius, director of British Bottled Water Producers Ltd.

For spring water, regulations are a little less stringent. The underground source does not have to be officially recognised by the FSA, although it must be declared on the label. Criteria for chemicals and microbes are “essentially the same as tap water,” says an FSA spokesperson.

The ‘bottled drinking water’ category encompasses all other types of bottled water, which are usually the least expensive brands. This designation has no restrictions on the water source, and may be drawn from the same source as tap. The requirements for chemicals, pathogens and pesticides are also the same as for tap.

“Comparing bottled water and tap is an odd thing to do as the two aren’t straightforward alternatives - any more than a soft drink or hot beverage is a tap water alternative,” says Jacobius.

By Gulnura Toralieva

Central Asia’s governments and civil society did not encourage climate-change discussions ahead of the Copenhagen summit in December, argues Cleo Paskal, associate fellow at the .

Gulnura Toralieva (GT): Why isn’t climate change on the agenda of developing countries and the Central Asian region in particular?

Cleo Paskal (CP): Climate change was presented by the developed world to the developing world. They’ve projected their own problems on to developing countries without really understanding what issues have importance for people in places like Central Asia. If you talk with somebody in Central Asia about climate change it doesn’t really make much sense. But if you talk with them about agriculture or water security then they understand clearly what the problems could be.

GT: Who should care about climate change and its environmental impact? Is it a problem of developed countries or the developing world?

CP: Central Asia has a long experience of environmental change. The Aral Sea is a good example, where man-made messing up of the environment has had severe environmental consequences. Climate change is a component of environmental change. You cannot address climate change alone without addressing other environmental problems. They all interconnect. This is the first thing. Then there is a question about how you handle climate change. It can be handled in two stages. You can mitigate it, to stop it from accelerating, or you can adapt to it. In most cases, people talk about mitigation and adaptation.

In the case of Central Asia, it is clear that not a lot of mitigation can be done. That economy has already been stretched thin. They have large existing industrial challenges left over from Soviet period. More critical issues for Central Asia are things like radioactive tailings and electrical and water systems. Those need to be dealt with. And if you deal with those they will help with adaptation to climate change.

Adaptation was predominantly developed in the developing world. The developing countries have had to adapt to environmental assaults for a long time. The science of adaptation is advanced in the developing world. The developed world has a lot to learn from developing countries when it comes to adaptation and the developing world really needs to start mitigation.

GT: What are the major social, political and economic implications of climate change on developing countries’ security?

CP: The developing countries are not one country. Each country has its own challenges and each region of each country has its own challenges. And that is the problem with environmental change, that it is not one problem it is a million problems. If you are in a coastal area, the problem could be flooding, it could be salt water getting into your fresh water system. If you in a dry area or desert area, it could be even dryer or you could get dust storms. If you are in mountain regions, it could be erosion or glacier melting.

So there may be many different sorts of problems and it will take many different sorts of solutions. And I would encourage people in the developing world who have found local solutions – and there are some good local solutions – to build bridges to other developing-world countries to see what you could learn from each other. Often the solutions found in the developing world are inexpensive, low-tech, and efficient. And those are the sorts of things which will be needed globally but can be developed, implemented and expanded through the developing world quite easily right now.

GT: Kyrgyzstan, the country I’m from, has serious environmental problems such as huge toxic waste dumps caused by radioactive production. As most of the uranium tailing sites are located in densely populated and natural disaster-prone areas of Central Asia’s largest river basins, they represent a major potential risk to the region’s water supply and the health of millions of people.

The problem is exacerbated by landslides caused by frequent rainfall near uranium dumps. If it is a consequence of climate change, what can you suggest we do to mitigate the negative impacts or to prevent the catastrophe?

CP: What you are talking about is a serious issue and gets even worse because Kyrgyzstan is also in an active seismic zone and there is evidence that as glacier melting takes weight off certain areas and puts it on others that can create more seismic movements. Heavy precipitation can also get into fissures and cracks and create a build up of pressure and create more seismicity.

In many different ways, climate change can exacerbate existing problems. The first step is to understand the problem, to do a really good, ground-level survey of what existing waste dumps there are, for example, and what the likely climate change projected for the region will be. In the case of Kyrgyzstan, you have a good survey from the Soviet administration, have good scientists domestically and there are good Russian scientists who were in the country but who have left. I would encourage building bridges with all the scientists who have left to try to make sure you have all the accurate data available. Files may have disappeared; they may have gone to Moscow.

You really need to know what has happened in your country in order to figure out how to move forward in a sustainable and safe way. In science, people tend to work in their own areas. So the people who work in radioactive tailings may or may not have spoken to people working in climate change or in hydrology or whatever.

GT: In one of your publications you said that climate change may affect the stability and security of some regions. It may even have negative impact on the security of the most stable regions. What can you say about the Central Asian region?

CP: It is a funny thing that people talk about Central Asia as if it is one homogenous country with one homogenous environment. As you know, there are many different people and there are many environmental situations. Some countries have a lot of water, some countries have no water. Some countries are close to Afghanistan, some are close to China. It is not one country.

So the challenges will be different. There are commonalities obviously, but when you look at environmental change, the impact is so regional that you must understand what has happened locally.

The other thing about Central Asia is its neighbours. The countries that are neighbouring China will start to get – and already have in fact seen – an increased influence from China. China has severe environmental problems. It hasn’t got enough water or food for its own population. So it will look to Siberia or appropriate countries in Central Asia to secure food and possibly water supplies. When China goes into a country, it is likely to want to ensure a degree of political control. That can affect your security situation.

Environmental change may also affect the security situation at a basic level if there is not enough food and water for the local population. There are potential areas where security can be compromised. We used to think about Central Asia firstly as a part of the Soviet Union but it is really an important component of global balance that is focused in a volatile area with Afghanistan, Russia and China and, to a certain degree, India also.

GT: What can Central Asian countries and Kyrgyzstan in particular address at the global climate change conference in Copenhagen in December?

CP: Kyrgyzstan hasn’t got an accurate understanding of its own problems and figuring out what it needs to address those problems and to ensure that those needs are met is important. It is in the interest of the developed world for the developing world to be as stable as possible. And if the developing world can clearly state “This is what we need” then that will be helpful to create global stability.

GT: The Central Asian states have many disagreements on energy and water sharing issues. The Soviet energy system united all five regional states, but doesn’t suit the interests of all these countries. Upstream and downstream countries always have room for being dissatisfied with each other’s policy.

Uzbekistan and Kazakhstan said recently that they are going to leave the Soviet-made system. Most of the countries work on developing their own energy systems and finding ways to be independent. But it is expensive and in some ways not possible. What is your view of this problem? What kind of implications does this situation have on regional stability?

CP: It is a serious problem. There are many serious problems. When the Soviet Union fell apart, it left Central Asia with three legacies, with three different problems which made unification or regional stability a little difficult.

One is that the infrastructure was designed for a whole – not just for a regional whole but a pan-Soviet whole. So the physical infrastructure was designed to be able to enforce co-operation even if it really doesn’t make sense.

The legal infrastructure has a similar problem. And the most obvious example is the borders, which divide tribes and language groups. The inherited legal infrastructure can cause problems when it comes to water- and power-sharing agreements.

Third is that Central Asian countries start to get real cultural polarisation and social fragmentation and then it becomes difficult to get over and it makes all the things more difficult. There is no feeling that you are all together. That’s why countries might think “Why should I deal with this country, if I have nothing in common with it except ancient history? Why can’t I deal with China or Russia instead?” Social cohesion comes first. If social cohesion starts to break apart, all the relations become difficult.

The existing system has some serious problems. It is old; it hasn’t been properly maintained and it was designed for a different environment. When you build such constructions you make environmental assessments: how much water is in the rivers, how much rainfall and so on and you look to the last 50 or 100 years to make these calculations. Those calculations no longer mean anything. The next 50 to 100 years will probably be very different from previous decades. That hydro installation you built which made perfect sense in 1980 may already make no sense today because of increased sedimentation, changing precipitation or glacier runoff.

The existing infrastructure you have may be severely affected by the environment. That old-build infrastructure may in no way be suitable to the new environment. The question is, in designing the new infrastructure, are they taking into account environmental change. Or are they designing it in the same way as they always design it. I suspect they don’t take environmental change into account. I’m not sure that this infrastructure will be able to deliver. It is important to take into account environmental change for both new and old infrastructure.

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By Aine Gormley

A UK water company has been permitted to pump more than a million litres of untreated sewage effluent into the North Channel every day, starting in summer 2011.

Northern Ireland Water (NIW) can avoid laws that other parts of the UK obey because it has no independent Environmental Protection Agency (EPA).

The Northern Irish environment agency is run by the government. The agency objected to NIW’s proposal for a sewage works serving 5,680 people, allowing the government-owned company to provide only primary treatment of the sewage.

Primary treatment removes solids but not toxic waste. Normally, sewage works in England and Wales that pump into the sea for populations over 2,000 must also apply secondary treatment.

But Edwin Poots, the Northern Ireland environment minister, a member of the Democratic Unionist Party (DUP), had the final say. He chose to reject the opposition to the proposed works, and construction will begins later this autumn.

Alliance Party member Sean Neeson has warned that population growth means the agreed level of treatment is unlikely to meet future requirements from the European Commission. “This will leave only two options: a further upgrade or heavy fines, to be paid by ratepayers,” said Mr. Neeson.

In May 2008, the then-Environment Minister Arlene Foster declined the chance to bring in an independent EPA. Ms. Foster said: “I and my party take the role of environmental governance too seriously to externalise the organisation”. She resigned 13 days after her decision.

Tom Burke, who chaired the 2008 Review of Environmental Governance in Northern Ireland, said that because of Northern Ireland’s fragmented institution, he was not surprised that NIW is allowed to pollute the environment more than other UK water companies.