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

905,613 views ・ 2023-10-05

TED-Ed


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翻译人员: Catherine Zheng 校对人员: Jacky He
00:07
Let's explore a hypothetical together.
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我们大家来探讨一个假设。
00:09
There are over four times as many livestock as people.
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牲畜的数量是人类的四倍多。
00:12
Farmed cattle alone weigh nearly ten times as much
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仅养殖牛的重量和就相当于所有
00:15
as all wild mammals combined.
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野生哺乳动物总和的十倍。
00:17
So imagine if a wizard of meatless dining suddenly appeared
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那么,假设一位 反肉食的巫师突然现身,
00:20
and with one wave of a wand wiped away all meat from our shelves—
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一挥魔杖把我们 全部的肉类给移除了,
00:24
along with any desire to eat it.
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也消灭了吃肉的欲望。
00:26
Farm animals destined for food vanish— whisked away to another planet.
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将要成为食物的养殖动物消失了, 被送到了另一个星球上。
00:31
What happens in the following days, years, and even millennia?
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在接下来的几天、几年甚至 几千年里会发生什么?
00:35
Overnight, food related greenhouse gas emissions drop by about 63%.
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一夜之间,与食物相关的 温室气体排放量下降约 63 %。
00:40
We no longer get protein and key nutrients
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我们不再从每年
00:43
from the approximately 70 billion chickens, 1.5 billion pigs,
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加工以被消费的 约 700 亿只鸡、15 亿头猪、
00:48
300 million cattle, and 200 million tons of fish and shellfish
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3 亿头牛和 2 亿吨鱼类和贝类中
00:52
processed for consumption each year.
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摄取蛋白质和关键营养素。
00:54
To help fill this nutritional gap,
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为了填补这一营养缺陷,
00:56
our demand for fruits, vegetables, and legumes go up—
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我们对水果、蔬菜和 豆类的需求都会增加——
01:00
a diet that most dietitians agree contains all of the nutrients we need
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这是大多数营养师认为 包含我们健康生活
01:05
for a healthy life.
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所有营养需求的饮食。
01:06
But initially there aren’t enough of these foods to go around.
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但是最初,这些食物的供应不足。
01:10
The rise in demand causes produce costs to soar.
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需求的增加导致农产品成本飙升。
01:13
In regions like Mongolia,
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在像蒙古这样的地区,
01:14
where the harsh environment makes it difficult to grow vegetables,
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恶劣的环境使种植蔬菜变得困难,
01:18
a sudden lack of meat leaves people with little to eat.
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突然缺肉使人们几乎没有什么食物。
01:21
Cultures built around meat lose their foundations.
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依赖肉类建立的文化 会失去他们的根基。
01:25
Members of salmon-eating tribes in the Pacific Northwest of the United States,
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例如,美国西北太平洋地区 食鲑鱼的部落成员
01:29
for example, lose not only sustenance and livelihoods,
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不仅失去了生计,
01:32
but an integral component of their religion.
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还失去了宗教不可分割的组成部分。
01:35
Tens of millions of anglers lose work that was already threatened
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数千万垂钓者失业, 即便这些工作本已
01:38
by dwindling fish populations.
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受到鱼类种群减少的威胁。
01:40
As the meat industry collapses,
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随着肉类行业的崩溃,
01:42
many households in developing countries are left scrambling for income
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发展中国家的许多家庭 只能急迫地搜寻
01:46
that once came from livestock farming.
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曾经来自畜牧业的收入。
01:48
Some meat producers shift to agricultural crops,
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一些肉类生产者转向农作物,
01:51
which leave workers— and neighboring communities—
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这使得工人和邻近社区
01:54
less susceptible to respiratory diseases associated with livestock production.
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不易感染与牲畜管理 相关的呼吸道疾病。
01:58
As crop agriculture expands, prices come down.
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随着农作物农业的扩张,价格下降。
02:02
Ultimately, vegetarianism becomes less expensive than meat-eating
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最终,在大多数国家,
02:05
in most countries.
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素食主义变得比吃肉便宜。
02:07
Luckily, we don’t need to clear new farmland to grow all this food.
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幸运的是,我们不需要开垦 新的农田来种植所有这些作物。
02:11
Without animals raised for meat,
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如果没有为肉类饲养的动物,
02:13
land that had been used to grow feed is now available.
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原本用来种植饲料的土地 变得现成可用。
02:16
All things considered, our new diets require less land and water.
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综合而言,我们的新饮食 需要更少的土地和水。
02:21
Millions of deaths are avoided every year,
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每年可以避免数百万人死亡,
02:23
thanks in part to lower rates of heart disease, cancer,
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这在一定程度上归功于心脏病、癌症
02:26
and other conditions associated with red meat consumption.
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和其他与红肉消费相关的 疾病发病率降低。
02:29
We no longer contract new pathogens from wild animals hunted for food,
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我们不再被捕获的野生动物 传染新的病原体,
02:33
or novel influenza viruses from farmed pigs,
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或者从养殖猪上感染新的流感病毒,
02:36
or drug-resistant superbugs that develop in beef cattle
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或是接触在提前施加 抗生素的肉牛身上
02:40
that have been preemptively fed antibiotics.
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出现的耐药超级细菌。
02:43
As the years pass, global biodiversity rises
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随着岁月的流逝, 全球生物多样性增加,
02:46
as habitat loss, pesticide use, and other pressures from agriculture subside.
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由于农业催生的栖息地丧失、 农药使用和其他影响消退。
02:51
Amazonian birds have more forest to fly over.
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亚马逊鸟类能飞越更广的森林。
02:54
Fewer cheetahs are shot for stalking too close to livestock.
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更少的猎豹因为捕猎牲畜而被射杀。
02:57
Bee, wasp, and butterfly communities thrive as natural areas expand.
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随着自然区域的扩大, 蜜蜂、黄蜂和蝴蝶群落茁壮成长。
03:03
In turn, insect-pollinated crops produce higher yields.
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于是,昆虫授粉作物的产量也更高。
03:07
Many ocean species rebound from overfishing.
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许多海洋物种从过度捕捞中恢复过来。
03:10
Throughout history, humans in traditionally vegetarian regions
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纵观历史,传统素食地区的人类
03:13
have evolved a genetic mutation
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已经进化出一种基因突变,
03:15
that helps them more efficiently process fats from plants.
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可以帮助他们更有效地 处理植物中的脂肪。
03:18
So over thousands of years,
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因此,几千年来,
03:20
our bodies may evolve to make the most of our veggies.
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我们的身体也许会进化以充分消化蔬菜。
03:22
Or we may lose some adaptations, like the ability to extract iron from meat.
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我们也可能会失去一些适应能力, 比如从肉中摄取铁的能力。
03:27
Of course, a wizard will not turn our world meatless.
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当然,没什么巫师 能使我们的世界无肉化。
03:30
Though many individuals are choosing to go vegetarian,
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尽管许多人选择吃素,
03:33
globally, meat eating is still on the rise.
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放眼全球,肉类摄入量 仍在上升阶段。
03:36
This trend spells trouble for our climate.
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这种趋势给我们的气候带来了麻烦。
03:38
Even if we suddenly stopped burning fossil fuels,
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即使我们当即停止燃烧化石燃料,
03:41
business as usual food systems paired with a growing population
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到本世纪末,同样的食物系统 加上不断增长的人口
03:44
would push global temperatures over 1.5°C by the end of the century.
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将使全球气温攀升超过 1.5°C。
03:49
Cattle are the biggest culprit.
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牛是最大的罪魁祸首。
03:51
Beef and dairy production are responsible for over 60% of all food-based emissions,
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牛肉和奶制品生产占 所有食物类排放量的 60% 以上,
03:56
while only providing around 18% of the world's calories.
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而仅提供全球约 18% 的卡路里。
03:59
In fact, diets containing modest portions of meats like chicken
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实际上,肉类占比少 (例如鸡肉)的饮食
04:03
often produce less greenhouse gas than vegetarian diets high in dairy.
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通常比乳制品含量高的素食 产生温室气体更少。
04:07
Reducing beef, cheese, and milk consumption could go a long way
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减少牛肉、奶酪和牛奶的消费
04:11
toward achieving many of the benefits of a meatless world—
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能长期带来无肉化 世界的许多益处——
04:14
no magic required.
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并不需要魔法。
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