What would happen if everyone stopped eating meat tomorrow? - Carolyn Beans

647,324 views ・ 2023-10-05

TED-Ed


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譯者: Lilian Chiu 審譯者: Yi-Ping Cho (Marssi)
00:07
Let's explore a hypothetical together.
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讓我們一起來探討一個假想情境。
00:09
There are over four times as many livestock as people.
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家畜的數量是人類的四倍以上。
00:12
Farmed cattle alone weigh nearly ten times as much
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單單養殖牛的總重量幾乎就是 所有野生哺乳類動物加總的十倍。
00:15
as all wild mammals combined.
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00:17
So imagine if a wizard of meatless dining suddenly appeared
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想像一下,如果突然 出現了一名無肉餐飲巫師,
00:20
and with one wave of a wand wiped away all meat from our shelves—
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一揮魔杖就讓我們架上 所有肉類都消失無蹤,
00:24
along with any desire to eat it.
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也讓我們沒有吃肉的欲望。
00:26
Farm animals destined for food vanish— whisked away to another planet.
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用來供應肉類的養殖場動物消失了——
被帶往另一個星球。
00:31
What happens in the following days, years, and even millennia?
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接下來的幾天、幾年, 甚至幾千年會如何?
00:35
Overnight, food related greenhouse gas emissions drop by about 63%.
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一夜之間,與食物相關的 溫室氣體排放量就下降了約 63%。
00:40
We no longer get protein and key nutrients
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我們的蛋白質和重要營養素 不再來自約七百億隻雞、
00:43
from the approximately 70 billion chickens, 1.5 billion pigs,
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十五億隻豬、
00:48
300 million cattle, and 200 million tons of fish and shellfish
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三億頭牛,和兩億噸 魚類和甲殼類水生動物,
00:52
processed for consumption each year.
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這是每年被加工成食品的動物數量。
00:54
To help fill this nutritional gap,
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為了補足這些少掉的營養,
00:56
our demand for fruits, vegetables, and legumes go up—
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我們對水果、蔬菜, 和豆類的需求增加——
01:00
a diet that most dietitians agree contains all of the nutrients we need
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大多數營養師都認同這類飲食
包含有健康生活所需的所有營養。
01:05
for a healthy life.
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01:06
But initially there aren’t enough of these foods to go around.
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但最初,這類食物的 數量不夠滿足需求。
01:10
The rise in demand causes produce costs to soar.
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需求的上升導致農產品成本飆升。
01:13
In regions like Mongolia,
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在像蒙古這樣的地區,
01:14
where the harsh environment makes it difficult to grow vegetables,
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因為環境惡劣,種植蔬菜十分困難,
01:18
a sudden lack of meat leaves people with little to eat.
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肉類突然消失,讓大家 幾乎沒東西可以吃。
01:21
Cultures built around meat lose their foundations.
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以肉類為中心建立的 文化失去了基礎。
01:25
Members of salmon-eating tribes in the Pacific Northwest of the United States,
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例如,在美國太平洋西北部, 吃鮭魚的部落族人
01:29
for example, lose not only sustenance and livelihoods,
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不僅失去了糧食和生計,
01:32
but an integral component of their religion.
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也失去了其宗教的一大要素。
01:35
Tens of millions of anglers lose work that was already threatened
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數千萬名垂釣者失去了
本來就已經因為魚類數量減少 而受到威脅的工作。
01:38
by dwindling fish populations.
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01:40
As the meat industry collapses,
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隨著肉類產業瓦解,
01:42
many households in developing countries are left scrambling for income
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發展中國家的許多家庭
因為失去原本來自畜牧業的 收入而陷入辛苦掙扎。
01:46
that once came from livestock farming.
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01:48
Some meat producers shift to agricultural crops,
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有些肉類生產者轉型改種農作物,
01:51
which leave workers— and neighboring communities—
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導致工人——以及鄰近社區——
01:54
less susceptible to respiratory diseases associated with livestock production.
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比較不會受到畜牧生產 相關的呼吸系統疾病所影響。
01:58
As crop agriculture expands, prices come down.
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隨著作物農業的擴大,價格會下降。
02:02
Ultimately, vegetarianism becomes less expensive than meat-eating
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最終,在大部分國家, 吃素變得比吃肉便宜。
02:05
in most countries.
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02:07
Luckily, we don’t need to clear new farmland to grow all this food.
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幸運的是,我們並不必開墾 新的農地來種植所有這些食物。
02:11
Without animals raised for meat,
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沒有為了食用而飼養的動物,
02:13
land that had been used to grow feed is now available.
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以前用來種飼料的土地 現在空下來可供使用。
02:16
All things considered, our new diets require less land and water.
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綜合來看,我們的新飲食 所需要的土地和水都較少。
02:21
Millions of deaths are avoided every year,
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每年可以避免數百萬人死亡,
02:23
thanks in part to lower rates of heart disease, cancer,
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有部分原因是因為 較少人患有心臟病、癌症,
02:26
and other conditions associated with red meat consumption.
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以及其他和吃紅肉相關的疾病。
02:29
We no longer contract new pathogens from wild animals hunted for food,
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我們不再因為捕殺野生動物 而染上新的病原體,
02:33
or novel influenza viruses from farmed pigs,
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或因為養豬而染上新型的流感病毒,
02:36
or drug-resistant superbugs that develop in beef cattle
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或在被餵食預防性 抗生素的食用牛身上
02:40
that have been preemptively fed antibiotics.
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產生的高抗藥性超級細菌。
02:43
As the years pass, global biodiversity rises
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隨時間過去,全球的 生物多樣性越來越高,
02:46
as habitat loss, pesticide use, and other pressures from agriculture subside.
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因為棲息地喪失、 殺蟲劑使用的情況減少,
其他來自農業的壓力也趨於平緩。
02:51
Amazonian birds have more forest to fly over.
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亞馬遜的鳥類有更多森林可以飛翔。
02:54
Fewer cheetahs are shot for stalking too close to livestock.
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也比較少有獵豹因為 跟蹤牲畜時太過靠近而被槍殺。
02:57
Bee, wasp, and butterfly communities thrive as natural areas expand.
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隨著自然區域的擴大,蜜蜂、 黃蜂,和蝴蝶群落都蓬勃發展。
03:03
In turn, insect-pollinated crops produce higher yields.
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接下來,昆蟲授粉的作物產量更高。
03:07
Many ocean species rebound from overfishing.
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本來因過度捕撈的許多 海洋物種重新復甦,
03:10
Throughout history, humans in traditionally vegetarian regions
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在歷史上,傳統素食地區的人類
03:13
have evolved a genetic mutation
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已經演化出一種基因突變,
03:15
that helps them more efficiently process fats from plants.
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讓他們能更有效地處理 來自植物的脂肪。
03:18
So over thousands of years,
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因此,經過數千年,
03:20
our bodies may evolve to make the most of our veggies.
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我們的身體可能演化成 能充分利用我們的蔬菜。
03:22
Or we may lose some adaptations, like the ability to extract iron from meat.
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或我們可能會失去一些適應能力, 例如從肉中提取鐵質的能力。
03:27
Of course, a wizard will not turn our world meatless.
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當然,巫師不會把我們的 世界變成無肉世界。
03:30
Though many individuals are choosing to go vegetarian,
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儘管有許多人選擇吃素,
03:33
globally, meat eating is still on the rise.
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就全球來說,肉食仍在增加。
03:36
This trend spells trouble for our climate.
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這個趨勢會給我們的氣候帶來麻煩。
03:38
Even if we suddenly stopped burning fossil fuels,
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即使我們突然停止燃燒化石燃料,
03:41
business as usual food systems paired with a growing population
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一切照舊的食物系統, 加上人口不斷增加,
03:44
would push global temperatures over 1.5°C by the end of the century.
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會在這個世紀末將全球溫度 推升攝氏一點五度以上。
03:49
Cattle are the biggest culprit.
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罪魁禍首是牛。
03:51
Beef and dairy production are responsible for over 60% of all food-based emissions,
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食物相關的排放總量中有至少 60% 和牛肉及乳製品的生產有關,
03:56
while only providing around 18% of the world's calories.
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但它們提供的卡路里 僅佔全球的約 18%。
03:59
In fact, diets containing modest portions of meats like chicken
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實際上,包含適當肉類 (如雞肉)份量的飲食
04:03
often produce less greenhouse gas than vegetarian diets high in dairy.
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產生的溫室氣體通常少於 大量乳製品的素食飲食。
04:07
Reducing beef, cheese, and milk consumption could go a long way
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少吃牛肉、乳酪,和牛奶,
對於協助實現無肉世界的 許多益處都有很大的幫助——
04:11
toward achieving many of the benefits of a meatless world—
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04:14
no magic required.
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不需要魔法就能辦到。
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