Andrew Taylor has eaten only potatoes for a whole year. Well, almost. He made his diet more nutritious by including sweet potatoes, and adding nut or soya milk to mashed potatoes. He also avoided vitamin B12 deficiency by taking supplements.
His cardiovascular health appears to have improved over the year, largely due to massive weight loss (50kg). He has cured his anxiety and depression, sleeps better and says he is fitter and healthier than he has ever been in his adult life. However, at the beginning of the year-long challenge, there was much debate among dietitians and nutritionists about whether he would get enough protein from his potato diet.
In the UK, healthy adults are advised to eat 0.75g of protein per kilogram of body weight each day. However, this “reference nutrient intake” is set at a high level to meet the needs of just about everyone in the population. Most people need less than this, and the average requirement is about 0.6g per kilogram of body weight (that is, 60g for Andrew’s current weight of about 100kg). Andrew ate about 3.5 to 4kg of potatoes per day, and together with the soya and nut milks used to mash the potato, it looks as though he managed to meet his protein requirements.
Good for the planet
Although combating global warming may not have been the primary reason for his challenge, Andrew has done his bit for planetary health. Agriculture’s greenhouse gas emissions are on the rise, with the largest source being methane produced by livestock. The agricultural sector is the world’s second largest emitter (after the energy sector) and the biggest thing that we can do to reduce these agricultural emissions is to eat less meat.
Becoming vegetarian or vegan would not be an acceptable or achievable option for many people, but even aiming for a plant-based diet, and limiting meat consumption, would make a substantial difference. Scientific models have suggested that if average diets in the UK conformed to WHO healthy diet guidelines, it would reduce greenhouse emissions associated with food by 17%.
Further cuts in emissions could be made by adopting a “flexitarian” eating pattern with fewer animal products and more plant foods. This pattern is not unlike that suggested in the current Eatwell guide and the World Cancer Research Fund cancer prevention recommendations, and would have substantial health benefits as well as being good for the planet.
But one barrier to reducing meat consumption is the belief that we need it to meet protein requirements. A low-protein, high-carbohydrate, plant-based diet contrasts with the dietary regimen currently promoted by the food and fitness industries. The public are encouraged to believe that their own diets are in some way lacking in protein, and that they need to focus on their protein intake to make up for some sort of deficit.
This is perhaps reinforced by the way that untrained nutrition “experts” translate protein requirements into food guidance. For example, they might quite correctly say that a healthy young man needs about 55g of protein per day. They then translate this into protein-containing foods, such as 100g steaks and 100g grilled chicken breasts, which each contain 30g of protein. What this doesn’t pick up on is the hidden protein in all the other foods eaten throughout the day.
For example, the following diet provides 2,500kcal of energy, enough for an average man. It also contains 136g of protein, more than twice the recommended amount.
It is not hard to meet protein requirements. A few groups of people may need proportionately more; for example, children, older people, anyone recovering from major surgery, pregnant women and some athletes. But even these groups would rarely need more than 1.5 to 2g of protein per kilogram of bodyweight per day.
If you’re looking to cut down on your meat consumption, maybe you could become flexitarian or do meat-free Mondays. You will still manage to meet your protein needs. And if you have already made the move away from meat, there are other things you can do with your diet to reduce your environmental impact without taking the radical step of eating only potatoes.
India’s urban water crisis calls for an integrated approach
We need solutions that address different aspects of the water eco-system and
involve the collective participation of citizens and other stake-holders.
According to a UN report, around 1.2 billion people, or almost one fifth of the world’s population, live in areas where water is physically scarce and another 1.6 billion people, or nearly one quarter of the world’s population, face economic water shortage. They lack basic access to water. The criticality of the water situation across the world has in fact given rise to speculations over water wars becoming a distinct possibility in the future. In India the problem is compounded, given the rising population and urbanization. The Asian Development Bank has forecast that by 2030, India will have a water deficit of 50%.
Water challenges in urban India
For urban India, the situation is critical. In 2015, about 377 million Indians lived in urban areas and by 2030, the urban population is expected to rise to 590 million. Already, according to the National Sample Survey, only 47% of urban households have individual water connections and about 40% to 50% of water is reportedly lost in distribution systems due to various reasons. Further, as per the 2011 census, only 32.7% of urban Indian households are connected to a piped sewerage system.
Any comprehensive solution to address the water problem in urban India needs to take into account the specific challenges around water management and distribution:
Pressure on water sources: Rising demand on water means rising pressure on water sources, especially in cities. In a city like Mumbai for example, 3,750 Million Litres per Day (MLD) of water, including water for commercial and industrial use, is available, whereas 4,500 MLD is needed. The primary sources of water for cities like Mumbai are lakes created by dams across rivers near the city. Distributing the available water means providing 386,971 connections to the city’s roughly 13 million residents. When distribution becomes challenging, the workaround is to tap ground water. According to a study by the Centre for Science and Environment, 48% of urban water supply in India comes from ground water. Ground water exploitation for commercial and domestic use in most cities is leading to reduction in ground water level.
Distribution and water loss issues: Distribution challenges, such as water loss due to theft, pilferage, leaky pipes and faulty meter readings, result in unequal and unregulated distribution of water. In New Delhi, for example, water distribution loss was reported to be about 40% as per a study. In Mumbai, where most residents get only 2-5 hours of water supply per day, the non-revenue water loss is about 27% of the overall water supply. This strains the municipal body’s budget and impacts the improvement of distribution infrastructure. Factors such as difficult terrain and legal issues over buildings also affect water supply to many parts. According to a study, only 5% of piped water reaches slum areas in 42 Indian cities, including New Delhi. A 2011 study also found that 95% of households in slum areas in Mumbai’s Kaula Bunder district, in some seasons, use less than the WHO-recommended minimum of 50 litres per capita per day.
Water pollution and contamination: In India,almost400,000childrendie every year of diarrhea, primarily due to contaminated water. According to a 2017 report, 630 million people in the South East Asian countries, including India, use faeces-contaminated drinking water source, becoming susceptible to a range of diseases. Industrial waste is also a major cause for water contamination, particularly antibiotic ingredients released into rivers and soils by pharma companies. A Guardian report talks about pollution from drug companies, particularly those in India and China, resulting in the creation of drug-resistant superbugs. The report cites a study which indicates that by 2050, the total death toll worldwide due to infection by drug resistant bacteria could reach 10 million people.
A holistic approach to tackling water challenges
Addressing these challenges and improving access to clean water for all needs a combination of short-term and medium-term solutions. It also means involving the community and various stakeholders in implementing the solutions. This is the crux of the recommendations put forth by BASF.
The proposed solutions, based on a study of water issues in cities such as Mumbai, take into account different aspects of water management and distribution. Backed by a close understanding of the cost implications, they can make a difference in tackling urban water challenges. These solutions include:
Recycling and harvesting: Raw sewage water which is dumped into oceans damages the coastal eco-system. Instead, this could be used as a cheaper alternative to fresh water for industrial purposes. According to a 2011 World Bank report, 13% of total freshwater withdrawal in India is for industrial use. What’s more, the industrial demand for water is expected to grow at a rate of 4.2% per year till 2025. Much of this demand can be met by recycling and treating sewage water. In Mumbai for example, 3000 MLD of sewage water is released, almost 80% of fresh water availability. This can be purified and utilised for industrial needs. An example of recycled sewage water being used for industrial purpose is the 30 MLD waste water treatment facility at Gandhinagar and Anjar in Gujarat set up by Welspun India Ltd.
Another example is the proposal by Navi Mumbai Municipal Corporation (NMMC) to recycle and reclaim sewage water treated at its existing facilities to meet the secondary purposes of both industries and residential complexes. In fact, residential complexes can similarly recycle and re-use their waste water for secondary purposes such as gardening.
Also, alternative rain water harvesting methods such as harvesting rain water from concrete surfaces using porous concrete can be used to supplement roof-top rain water harvesting, to help replenish ground water.
Community initiatives to supplement regular water supply: Initiatives such as community water storage and decentralised treatment facilities, including elevated water towers or reservoirs and water ATMs, based on a realistic understanding of the costs involved, can help support the city’s water distribution. Water towers or elevated reservoirs with onsite filters can also help optimise the space available for water distribution in congested cities. Water ATMs, which are automated water dispensing units that can be accessed with a smart card or an app, can ensure metered supply of safe water.
Testing and purification: With water contamination being a big challenge, the adoption of affordable and reliable multi-household water filter systems which are electricity free and easy to use can help, to some extent, access to safe drinking water at a domestic level. Also, the use of household water testing kits and the installation of water quality sensors on pipes, that send out alerts on water contamination, can create awareness of water contamination and drive suitable preventive steps.
Public awareness and use of technology: Public awareness campaigns, tax incentives for water conservation and the use of technology interfaces can also go a long way in addressing the water problem. For example, measures such as water credits can be introduced with tax benefits as incentives for efficient use and recycling of water. Similarly, government water apps, like that of the Municipal Corporation of Greater Mumbai, can be used to spread tips on water saving, report leakage or send updates on water quality.
Collaborative approach: Finally, a collaborative approach like the adoption of a public-private partnership model for water projects can help. There are already examples of best practices here. For example, in Netherlands, water companies are incorporated as private companies, with the local and national governments being majority shareholders. Involving citizens through social business models for decentralised water supply, treatment or storage installations like water ATMs, as also the appointment of water guardians who can report on various aspects of water supply and usage can help in efficient water management. Grass-root level organizations could be partnered with for programmes to spread awareness on water safety and conservation.
For BASF, the proposed solutions are an extension of their close engagement with developing water management and water treatment solutions. The products developed specially for waste and drinking water treatment, such as Zetag® ULTRA and Magnafloc® LT, focus on ensuring sustainability, efficiency and cost effectiveness in the water and sludge treatment process.
BASF is also associated with operations of Reliance Industries’ desalination plant at Jamnagar in Gujarat.The thermal plant is designed to deliver up to 170,000 cubic meters of processed water per day. The use of inge® ultrafiltration technologies allows a continuous delivery of pre-filtered water at a consistent high-quality level, while the dosage of the Sokalan® PM 15 I protects the desalination plant from scaling. This combination of BASF’s expertise minimises the energy footprint of the plant and secures water supply independent of the seasonal fluctuations. To know more about BASF’s range of sustainable solutions and innovative chemical products for the water industry, see here.
This article was produced by the Scroll marketing team on behalf of BASF and not by the Scroll editorial team.