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What If The World Went Vegetarian?

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Published: 9.09.2017
Level 4   |   Time: 3:46
Accent: American
Source: AsapScience

A description of the advantages and disadvantages of the whole world becoming vegetarian.


    

triangle Directions


  1. REVIEW the vocabulary / background.
  2. WATCH the video.
  3. ANSWER the questions.
  4. CHECK your answers. (Show Answers)

triangle Vocabulary


  • full disclosure [exp] - being 100% honest
  • herds [n] - large groups of animals
  • domestic animals [n] - animals raised by humans
  • vast quantities [exp] - large amounts
  • pasture [n] - land used for animals to live on and eat grass
  • animal feed [n] - food given to animals
  • counteract [v] - fight against
  • CO2 [n] - carbon dioxide
  • livestock [n] - farm animals
  • greenhouse gas emissions [n] - gas that causes global warming
  • water intensive [adj] - uses a lot of water
  • downsides [n] - disadvantages
  • byproducts [n] - the secondary (not main) product
  • animal hides [n] - the skin of animals (used to make leather)
  • detergents [n] - laundry or dish soaps
  • obsolete [adj] - out of date or unnecessary

[n] - noun,  [v] - verb,  [adj] - adjective,  [exp] - expression


triangle Questions


  1. The people who made this video are vegetarians.
    True
    False

  2. The rate of vegetarianism is much higher in Canada than in India.
    True
    False

  3. Cows are the most common (populace) farm animal is the world.
    True
    False

  4. The amount of land used for animal pasture worldwide is similar to the size of all of Africa.
    True
    False

  5. A lot of land is also used to grow feed for animals.
    True
    False

  6. Current pasture land could easily be used for growing crops.
    True
    False

  7. Without humans managing pasture land, it would likely become desert.
    True
    False

  8. Deforestation (tree loss) for agriculture has led to increased CO2 levels around the world.
    True
    False

  9. Methane emitted by cows is one cause of global warming.
    True
    False

  10. Animal farming produces more greenhouse gas than cars, train and airplanes combined.
    True
    False

  11. A worldwide vegetarian diet would reduce freshwater consumption.
    True
    False

  12. Compared to other meats, pork production requires the most water per kilogram.
    True
    False

  13. Fruit and vegetable production requires much more water consumption than meat production.
    True
    False

  14. One kilogram of fruit has many more calories than one kilogram of meat.
    True
    False

  15. Meat production also provides material for leather goods, candles and cosmetics.
    True
    False

  16. Without meat production, people would need to use land to raise animals for leather goods, candles and cosmetics.
    True
    False

  17. As many as one billion people worldwide would lose their jobs without the meat industry.
    True
    False

  18. Most of this job loss would occur in European and North American countries.
    True
    False

  19. Worldwide meat consumption is generally decreasing.
    True
    False

  20. As people become wealthier in China and India, they eat less meat.
    True
    False


triangle Script



Chances are you or someone you know is vegetarian - so we thought we’d try a thought experiment. What would happen if everyone in the world was suddenly a vegetarian? What effect would it have on our lives and the planet?

Before we begin, full disclosure: none of us at AsapSCIENCE are vegetarians.

And the worldwide rate of vegetarianism is fairly low, ranging from about 4-5% in the US and Canada to a little over 30% in India. As a result, there are currently about 20 billion chickens, 1.5 billion cows, over a billion sheep and nearly a billion pigs in the world. Without any meat-eating humans to provide a market, whole herds of domestic animals would disappear.

And this would free up vast quantities of land. About 33 million square kilometres of land are used for pasture - an area about the size of Africa. And that’s not even counting the land used to grow crops exclusively for animal feed. Some of it would be needed for the increased amount of vegetable crops, but much of the land currently used as pasture is actually too dry to grow crops. Without humans adding artificial nutrients, this land could turn to desert, but if properly managed, it’s possible that some farmland would return to its natural state of grassland or forests, which could help counteract global climate change. After all, the loss of CO2-absorbing trees cleared for agriculture is a major reason why global levels of CO2 are going up.

Cows and other grazers also affect our climate through large amounts of methane production, which has 25 times more potential planet-warming power than CO2. Combined with the loss of forests and other effects, livestock production is responsible for about 15% of global greenhouse gas emissions, which is more than all the world’s planes, trains and automobiles put together. In fact, many scientists believe that reducing meat consumption may be one of the best strategies for managing climate change.

A vegetarian diet would also greatly reduce water consumption; around 70% of global freshwater consumption is used in agriculture. It takes 15,000 litres to make a kilogram of beef, 6,000 L for pork and 4,000 L for chicken - Compare this with 1,600 L for cereal crops, 900 L for fruit and 300 L for garden vegetables. Of course a kilogram of meat packs many more calories than an equivalent weight of fruit, but even if you compare the ratio of water per calorie of available food energy, beef is still 5 times more water intensive than fruit, 7 times more than veggies and 20 times more than cereal.

So are there any downsides to a vegetarian diet? Well, we’d be left without a cheap source for many byproducts of livestock, like leather from animal hides, or animal fats which are used in cosmetics, candles and detergents. And while vegetable based alternatives do exist, their production would need to increase, meaning more land dedicated to growing crops and less restored to its natural state.

A more complicated fact is that raising and processing animals is a full-time job for more than 1 billion people - most of whom are small-scale farmers in the developing world. While some may be able to move to producing milk or eggs, or even growing vegetable crops, many would be faced with their way of life becoming obsolete.

Of course, any increase in vegetarianism is likely to be a gradual process rather than a sudden cut-off. And, surprisingly, the trends are actually in the opposite direction; in places like India and China, people are becoming wealthier, and as a result, consuming more meat which effectively cancels out the declines we see in other countries.

So, we actually tried to go vegetarian for 21 days straight as an experiment in our new AsapTHOUGHT episode. Check out the video if you want to see how it went, what we learned in the process and how we felt about it! And subscribe for more weekly science videos!

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