Product

How industrial agriculture is disturbing the nitrogen cycle and undermining conditions for life on Earth

Retrieved on: 
Wednesday, January 3, 2024

Six of our nine planetary boundaries have now been crossed – and industrial agriculture are the main culprit.

Key Points: 
  • Six of our nine planetary boundaries have now been crossed – and industrial agriculture are the main culprit.
  • This notion of overstepping boundaries is clear in regard to the best-known limit of them all: that of climate change.
  • Yet in the case of the planetary boundary for nitrogen, exceeding the threshold is different, as it is the industrialisation of agriculture that is largely, and more complexly, responsible for breaking the limit.
  • But how can agriculture affect the nitrogen cycle?

The natural nitrogen cycle

  • First, we need to understand the natural cycle of carbon and nitrogen – two of the main elements that form living matter.
  • So, the boundaries of the nitrogen cycle have to remain local: any loss of nitrogen brings about a risk of soil depletion, which jeopardises continued plant growth.
  • The amount of nitrogen that is lost in the atmosphere and in groundwater is therefore considerable, and this loss makes nitrogen the main limiting factor in plant growth.
  • They do so through a symbiotic association with bacteria that have enzymes needed to convert molecular nitrogen into proteins.
  • It is this symbiotic fixation that offsets the natural environmental loss of nitrogen and ensures that terrestrial ecosystems function perennially.

Farming and fertilisation

  • Each time plants are harvested, the nitrogen contained in them is carried far away from the plot of soil where it came from.
  • That is the purpose of fertilisation.
  • There are many methods of fertilisation.
  • Indeed, this method was the basis of traditional systems of polyculture and livestock farming.
  • They quickly made traditional polyculture and livestock farming obsolete and paved the way to intensified and specialised agriculture, which was henceforth coupled with the heavy chemical industry.

Environmental nitrogen loss

  • In this accelerated flow of nitrogen, what causes trouble is the environmental nitrogen loss that results from it.
  • Indeed, the more nitrogenous fertilisers are used to increase crop yields, the less the added nitrogen is effective and the greater the losses through leaching and volatilisation.
  • What we call the nitrogen surplus is the excess of nitrogen put into the soil in relation to the quantity actually taken away through harvesting.

Feeding the world without ruining it

  • But can we reasonably scale down intensive farming without jeopardising the food security of a world that will have 10 billion mouths to feed by 2050?
  • Yet we can only do so if three major structural changes are made to the entire agrifood system at the same time as intensive agriculture is toned down.
  • On the contrary, this model of agriculture has now been clearly identified as a factor that disturbs the Earth’s system profoundly.
  • AFP and The Conversation France have maintained their editorial independence at every stage of the project.


Gilles Billen ne travaille pas, ne conseille pas, ne possède pas de parts, ne reçoit pas de fonds d'une organisation qui pourrait tirer profit de cet article, et n'a déclaré aucune autre affiliation que son organisme de recherche.

Meeting highlights from the Committee for Veterinary Medicinal Products (CVMP) 5-7 December 2023

Retrieved on: 
Monday, December 18, 2023

The Committee adopted by consensus a positive opinion for a variation requiring assessment for Solensia (frunevetmab) to implement the outcome of the MAH’s signal management…

Key Points: 


The Committee adopted by consensus a positive opinion for a variation requiring assessment for Solensia (frunevetmab) to implement the outcome of the MAH’s signal management…

Quarterly system demo - Q4 2023, Online, from 19 December 2023, 09:00 (CET) to 19 December 2023, 14:00 (CET)

Retrieved on: 
Monday, December 18, 2023

Date

Key Points: 
  • Date
    - Tuesday, 19 December 2023, 09:00 (CET) - 14:00 (CET)
    Location
    - Online
    Event summary
    This is the fourth system demo of 2023, the eighth ever held by EMA as part of its Agile transformation.
  • A system demo provides an integrated view on what has been built in the past 3 months (Programme Increment).
  • It is the opportunity for the audience to give instant feedback to the Agency's development teams to build the right solution.
  • Live broadcast - 9:00 - 14:00 Amsterdam time (CET)
    To view the broadcast please ensure you meet the YouTube requirements.

New single-use plastic ban takes effect in England – here's why its impact may be limited

Retrieved on: 
Monday, October 2, 2023

In the UK, households collectively throw away an estimated 100 billion pieces of plastic packaging each year.

Key Points: 
  • In the UK, households collectively throw away an estimated 100 billion pieces of plastic packaging each year.
  • In 2020, the UK government banned the sale of several single-use plastic products in England including straws, stirrers and cotton buds – but with exceptions for medical use.
  • From October 1 2023, businesses in England are prohibited from selling several other single-use plastic products including plastic cutlery, balloon sticks and polystyrene cups.

What will the ban change?

    • Plastics that are particularly difficult to recycle like polystyrene cups also have stricter rules, but with a few exceptions too.
    • The new ban also doesn’t cover single-use plastic packaging.
    • Single-use plastic packaging is one of the leading sources of plastic pollution in the UK.

How effective will the ban be?

    • The new ban is a step towards tackling the impacts of pollution caused by single-use plastics.
    • However, for such a ban to be genuinely effective, several key elements must be in place.
    • This ensures that those affected understand the ban’s purpose and how its progress will be assessed, while also promoting accountability.
    • The government’s new ban lacks any specific or measurable objectives.

Improving awareness

    • For example, businesses were given several months after the consultation on the ban to prepare and use up excess stock.
    • Adequate public awareness is also necessary to ensure everyone understands the reasons behind the ban, how it affects them, and what the available alternatives are.
    • In Rwanda, where a ban on plastic bags was introduced in 2008, announcements were made on airlines and at ports of entry to inform visitors.
    • In a similar way, the UK government’s recent ban is accompanied by official guidance explaining the ban’s implications.
    • Every Wednesday, The Conversation’s environment editor writes Imagine, a short email that goes a little deeper into just one climate issue.

Is TikTok right – will eating three carrots a day really give me a natural tan?

Retrieved on: 
Wednesday, September 27, 2023

A beauty trend gaining popularity on TikTok, dubbed the “carrot tan”, claims eating three carrots a day will give you a natural tan. But can this really give you a natural glow? And is it healthy?

Key Points: 


A beauty trend gaining popularity on TikTok, dubbed the “carrot tan”, claims eating three carrots a day will give you a natural tan. But can this really give you a natural glow? And is it healthy?

Read more:
Explainer: why are carrots orange?

Why would carrots affect your skin tone?

    • There are many carotenoids including lutein, lycopene, alpha-carotene and beta-carotene.
    • Any extra beta-carotene is then either stored in the liver and fat tissue, excreted through poo, or removed via sweat glands in the outer layer of the skin.
    • Carotenoderma gives your skin a yellow/orange pigment that is not the same colour you’d turn from a sun tan.
    • Carrots are not the only food that contains beta-carotene.

How many carrots are we talking?

    • No high quality trials have been conducted to test the relationship between number of carrots eaten per day and skin colour changes or other outcomes.
    • One published case report (where researchers talk about one patient’s case) found eating around 3 kilograms of carrots per week (about seven large carrots a day) induced skin colour changes.
    • Other experts suggest you would need to eat at least ten carrots per day, for at least a few weeks, for colour changes to occur.

Is it dangerous to eat too much beta-carotene?

    • When you eat these foods the preformed vitamin A is already ready to be used by the body.
    • Provitamin A compounds (including beta-carotene) are the precursors to vitamin A. Provitamin A compounds need to be converted into active vitamin A once inside the body.
    • Read more:
      Carrots and pumpkin might reduce your risk of cancer, but beware taking them in pill form

Why you should aim for a variety of vegetables

    • Incorporating various colourful vegetables, particularly those high in carotenoids, into your diet may promote a natural radiance and a gentle enhancement in skin tone.
    • Rather than processed foods, a high variety of fresh vegetables provide various nutrients, and some may have what others lack.

How burgers and chips for lunch can worsen your asthma that afternoon

Retrieved on: 
Tuesday, July 25, 2023

Food can affect how well your lungs function, how often you have asthma attacks and how well your puffer works.

Key Points: 
  • Food can affect how well your lungs function, how often you have asthma attacks and how well your puffer works.
  • Here’s what we know about which foods to eat more of, and which are best to eat in smaller amounts, if you have asthma.

Asthma and inflammation

    • This makes it difficult for them to breathe during what’s commonly known as an asthma attack (or exacerbation).
    • Researchers are becoming increasingly aware of how someone’s diet can affect their asthma symptoms, including how often they have one of these attacks.
    • Read more:
      Passive smoking, synthetic bedding and gas heating in homes show the strongest links to asthma

Thumbs up for fruit and veg

    • The Mediterranean diet – a diet high in fruit, vegetables and oily fish – is linked with less wheezing in children, whether or not they have been diagnosed with asthma.
    • Some, but not all, of the studies found this was regardless of the children’s body-mass index (BMI) or socioeconomic status.
    • However a review looked at five studies that investigated omega-3 intake (through the diet or with a supplement) in adults with asthma.
    • Of course there is no harm in eating foods high in omega-3 – such as oily fish, flaxseeds, chia seeds and walnuts.

Thumbs down for saturated fat, sugar, red meat

    • Diets high in saturated fats, plus sugar and red meat, can worsen someone’s asthma symptoms.
    • Foods high in saturated fat can have an impact in as little as four hours.
    • People who ate the meal high in saturated fat had reduced lung function within four hours.

What about dairy?


    One food type you don’t have to avoid, though, is dairy products. Although many people with asthma report eating dairy worsens their asthma, evidence shows this to be untrue. In fact, one study in adults with asthma found drinking milk was linked to better lung function.

    Read more:
    Monday's medical myth: dairy products exacerbate asthma

The cost of living is biting. Here’s how to spend less on meat and dairy

Retrieved on: 
Wednesday, July 19, 2023

Food and non-alcoholic drinks rose by 7.9% in the year to May, with biggest increases in dairy products (15.1%), breads and cereals (12.8%) and processed foods (11.5%).

Key Points: 
  • Food and non-alcoholic drinks rose by 7.9% in the year to May, with biggest increases in dairy products (15.1%), breads and cereals (12.8%) and processed foods (11.5%).
  • Meat costs rose by 3.8%, but the absolute increase was high, with a kilo of fillet steak costing up to A$60 for a kilogram.
  • Australians spend around 15% of their weekly food budget on meat and half that (7.4%) on dairy products.

Meat

    • Meat is a good source of protein, iron, zinc and vitamin B12.
    • Recommendations are for a maximum of three serves of cooked lean red meat a week.
    • This includes beef, lamb, veal, pork, or kangaroo, with a serve being 65g cooked, which equates to 90–100g raw.
    • Read more:
      Love meat too much to be vegetarian?

Dairy

    • Dairy products are important sources of protein, calcium, magnesium, zinc, potassium and vitamins A, B2 and B12.
    • Australian recommendations are for two to three serves a day for adults and four serves for women over 50.
    • Fresh milk costs between $1.50 and $3.00 per litre depending on type and brand, while UHT milk is cheaper, about $1.60 per litre.
    • It’s even cheaper to buy powdered milk ($10 per kilogram pack, which makes ten litres), equating to $1 per litre.
    • Block cheese ranges from $15 to $30 a kilogram, while packets of pre-sliced cheese vary from $18 to over $30.

3 tips to save on your food bills

    • Have a household food budget Ensure everyone is on the same page about saving money on food and drinks.
    • About 50% of household food dollars are spent on takeaway, eating out, coffee, alcohol, food-delivery services and extras, so have a budget for discretionary food items.
    • Your household might need an incentive to stick to the budget, like voting on which “discretionary” items food dollars get spent on.
    • If you need food help right now, the Ask Izzy website can locate services in your area.

Fiber is your body's natural guide to weight management – rather than cutting carbs out of your diet, eat them in their original fiber packaging instead

Retrieved on: 
Monday, July 3, 2023

Research suggests that carbohydrates are meant to come packaged in nature-balanced ratios of total carbohydrates to fiber.

Key Points: 
  • Research suggests that carbohydrates are meant to come packaged in nature-balanced ratios of total carbohydrates to fiber.
  • Your microbiome transforms fiber into signals that stimulate the gut hormones that are the natural forms of these drugs.
  • The research is clear – fiber is important not just for happy bowel movements, but also for your blood sugar, weight and overall health.

Carbohydrates without their wrappers

    • In fact, only 5% of Americans eat the recommended amount of carbohydrates with enough of their natural packaging intact.
    • One popular approach to mitigating some of the ill health effects of low fiber and high refined carbohydrates has been to limit carbohydrate intake.
    • Each diet is a variation on a similar theme of limiting carbohydrates to varying amounts in different ways.
    • Research shows that limiting carbohydrates induces ketosis, a biological process that frees energy from fat reserves during starvation and prolonged exercise.

Is a carb a carb?

    • Limiting simple sugars and refined carbohydrates may improve certain aspects of metabolic health, as these are some of the most easily digested and absorbed calories.
    • They come in ratios of total carbohydrate to fiber that rarely exceed 10-to-1 and are often 5-to-1 or lower.
    • Eating mostly whole foods is a simple way to ensure you’re consuming quality carbohydrates with the right ratios.

Listen to your body

    • While almost all fiber is generally good for health in most people, not all fiber affects the body in the same way.
    • Consuming a range of different types of fiber generally helps ensure a diverse microbiome, which is linked to gut and overall health.
    • Listen to how your body responds to different high-fiber foods.

Full-fat or low-fat cheese and milk? A dietitian on which is better

Retrieved on: 
Thursday, June 22, 2023

When it comes to dairy products do you tend to buy full-fat or low-fat products?

Key Points: 
  • When it comes to dairy products do you tend to buy full-fat or low-fat products?
  • For many people, going for low-fat options can seem like the “healthier” choice.
  • But is low-fat milk, cheese, yoghurt and butter really any better for us?
  • Most relevant dietary guidelines encourage the consumption of low-fat dairy foods, except for in very young children.

Explaining the science

    • There is increasing evidence that some of the fatty acids found in dairy fats might actually reduce our risk of developing heart disease and type 2 diabetes.
    • But it may well be that other recommendations to use lower-fat dairy products are based more on maths than science.
    • It appears to be based on historical farming practices that used leftover skimmed milk from making cream to fatten piglets.

Low-fat v full-fat

    • Research has found that higher intakes of saturated fatty acids are linked to an increased risk of heart disease, type 2 diabetes and dementia.
    • So these recommendations may come as part of suggestions to limit overall fat intake more broadly, rather than because full-fat dairy is “bad” for us.
    • So if you consume dairy products, it’s likely that there’s no need to worry too much about the fat content.

Your snacks may be delicious, but are they safe?

Retrieved on: 
Sunday, June 4, 2023

According to the World Health Organization, food-borne diseases affect an estimated 600 million people annually, resulting in 420,000 deaths globally.

Key Points: 
  • According to the World Health Organization, food-borne diseases affect an estimated 600 million people annually, resulting in 420,000 deaths globally.
  • For most developing countries, it can be difficult to practise food safety when clean water and sanitation aren’t available.
  • It depends on various factors like where the ingredients come from, and how snacks are prepared and stored.
  • By following the tips I offer here, you can enjoy your snacks and reduce the risk of foodborne diseases.

Managing the risks

    • Raw materials, including fruits, vegetables and animal products, can be contaminated with harmful microorganisms, such as bacteria, viruses, and parasites.
    • To reduce the risk of contamination, it is important to buy ingredients from trusted suppliers who have good hygiene practices.
    • When buying fresh produce, look for signs of spoilage, such as mould, discolouration and foul odours.
    • Food processing, such as canning and freezing, can kill harmful microorganisms and extend the shelf life of products.

Symptoms of food-borne diseases

    • Knowing the most common types of foodborne illnesses and their symptoms is very important.
    • Symptoms of food-borne illness can range from mild, such as nausea and diarrhoea, to severe, such as kidney failure and paralysis – the inability to move some or all parts of your body.
    • If you experience or observe any symptoms of food-borne illness after eating a snack, seek medical attention immediately.