B1 中級 173 タグ追加 保存
動画の字幕をクリックしてすぐ単語の意味を調べられます!
単語帳読み込み中…
字幕の修正報告
Over the last few years,
organic food has spread like wildfire.
Despite higher prices,
buying organic is turning from an alternative
into a moral and social responsibility.
Organic food is supposedly healthier
more natural and more ethical.
But what do we even mean when we say organic?
There's no global consensus,
so different regions have different definitions and rules.
In general,
organic food is farmed without GMO seeds,
synthetic fertilizers,
or synthetic pesticides.
Instead,
organic farmers use more traditional ways of producing food,
like crop rotation,
and use organic fertilizers
such as compost or manure.
While the motivation to buy organic food is clearly noble,
is it actually effective
or just another costly trend we can skip
without feeling guilty?
[Music]
Is organic food healthier?
One idea associated with organic crops
is that their natural cultivation
is supposed to make them more nutritious and healthier.
Indeed,
several studies found that organic foods contain more antioxidants.
Plants produce them as a sort of homemade pesticide.
Organic plants seem to have to work a little harder,
while regular plants have plenty of help from humans.
Antioxidants are believed to have some health benefits,
although scientists are still on the fence about them in general.
We have no idea if and how exactly they help us,
or how much produce you'd have to eat to absorb a certain amount.
What about organic being more nutritious?
Well, the evidence is mixed.
Some studies found
that organic food can have slightly higher concentrations of vitamin C,
and omega-3 fatty acids,
while others did not find significant differences.
Overall, the mixed evidence
suggests that there are only small differences in nutritional value.
So, from the science available so far,
it doesn't look like organic food has significant health benefits.
What we do know,
is that eating fruit and veggies in general is good for you,
and most of us don't do that enough.
Eating veggies is more important for your health
than how they were produced.
Is organic food more natural?
People don't only buy organic to get extra vitamins,
but to avoid something toxic;
artificial pesticides and fertilizers.
And indeed several studies show
that there actually is less pesticide residue on organic produce.
But here's where things get complicated.
Less pesticide does not mean none at all.
While pesticides are supposed to be a last resort in organic farming,
they're not forbidden.
Most organic pesticides are natural toxins,
like vegetable oils,
hot ash soap,
sulfur or copper sulfates.
But there are synthetic substances as well.
What's the difference between organic and regular pesticides?
Not a lot actually.
Organic pesticides
are not necessarily safer than conventional ones.
Toxic is toxic.
No matter if the substance is manufactured,
or derived from nature.
In fact,
in the case of copper sulfate,
often used on organic apples,
the organic pesticide of choice
is actually more harmful to humans.
The toxicity of any substance
depends on its concentration
and your exposure to it --
not if it's natural or not.
There are a few recent studies
about how our current level of pesticide exposure
affects our long-term health.
The 2018 study from France
associated never eating organic food
with a higher risk of certain cancers.
The study was criticized a lot though.
The participants reported their dietary habits themselves,
while no actual tests of pesticide levels in their bodies were done.
Complicating things even more,
a Danish study from 2018
found that the danger from pesticides for an adult
was similar to drinking a glass of wine every three months.
The pesticides on your vegetables
are nothing to lose sleep over.
Despite this,
we should continue to demand strict standards for our food.
All pesticides are regulated and tested very strictly
in the EU and the US.
Every year,
thousands of food samples are screened for pesticides.
The majority of samples have no residues
or just a fraction of the tolerance level.
Right now,
contamination from bacteria and fungi
is much more dangerous.
And, on this front,
the risk is the same --
be it organic or regular food.
Is organic food better for the environment?
In 2017, a meta-analysis
looked at organic farming in detail
and analyzed organic and regular foods
from over 700 production sources,
and their impact on categories like greenhouse gas emissions,
energy consumption,
and land needs.
The result?
No production method is clearly better for the environment.
Organic systems use less energy than conventional ones,
but have similar greenhouse gas emissions.
Organic farms use less pesticide,
but need much more land to produce the same amount of crop.
These mixed results were also confirmed
by a report from the Swedish food agency.
Organic and regular were equal in most regards.
The biggest difference was land use.
And here conventional farming clearly won,
and ecotoxicity
where organic farming has a clear advantage.
So, according to these results,
conventional farming
actually has a little bit less impact on the environment
compared to organic.
The bottom line is
organic food isn't superior to regular produce
as far as we know.
But, organic agriculture also has an impact at a broader level.
Demand is rising constantly,
and the struggle to supply the market
can lead to production methods that are less sustainable in other ways.
Spain, for example,
grows tons of regular and organic vegetables
destined for export
in vast greenhouse areas which use a lot of energy.
And have other environmental impacts,
such as significantly higher greenhouse gas emissions.
And, because growing demand can't be covered by domestic production,
the global trade and organic foods is also increasing.
As supply chains get more and more complex,
to make all kinds of foods available in organic quality,
ensuring organic quality standards
and regulations gets ever more difficult.
This has led to incidences of fraud
where conventional food was labeled and sold
as expensive organic produce.
But, organic versus conventional food
isn't even an objective discussion.
Organic is not simply a production method.
For many, it's an ideology.
Buying organic feels right.
People want to do the correct thing for the health of their children,
and the well-being of the planet.
But, our instinct to think of organic as good,
and conventional as bad,
can get in the way of making the most reasonable decision.
The solution could be to stop seeing organic
and conventional farming as irreconcilable.
They both have pros and cons,
and the best way to produce healthy food efficiently
would be a combination of their best features.
And,
as for your personal shopping,
what food you should buy
depends on what you expect from it.
If you simply want to eat healthily,
you should buy more fruit and vegies of any kind,
not necessarily organic.
If your concern is for the environment,
then simply buying organic won't solve this problem for you.
The easiest option,
is to buy local food that's in season.
Basically,
seasonal is the true organic.
To sum up,
an organic label is a manufacturing notice,
not a security certificate
or a silver bullet for your diet.
What you eat
is much more important than how its produced.
Production is very important for our animations though.
We make them with a lot of love and care,
and the best thing is
you can learn how to do them.
Kurzgesagt joined Skillshare,
our favorite online learning community for creators
with the three-part series of 2D animation classes.
Skillshare offers more than 25,000 classes on everything from film,
writing, design, and technology,
from skilled experts.
The premium membership gives you unlimited access for only $10 a month.
But we got you a treat!
The first 1,000 people to use the link in the description,
get their first 2 months for free.
So, to kick-off 2019,
if you want to give animation a try,
and breathe life into our characters,
or learn something else to fuel your creativity or even career,
now you can!
コツ:単語をクリックしてすぐ意味を調べられます!

読み込み中…

有機食品は本当に良いものなのか?健康な食品?それとも詐欺? (Is Organic Really Better? Healthy Food or Trendy Scam?)

173 タグ追加 保存
ally.chang 2020 年 2 月 18 日 に公開
お勧め動画
  1. 1. クリック一つで単語を検索

    右側のスプリクトの単語をクリックするだけで即座に意味が検索できます。

  2. 2. リピート機能

    クリックするだけで同じフレーズを何回もリピート可能!

  3. 3. ショートカット

    キーボードショートカットを使うことによって勉強の効率を上げることが出来ます。

  4. 4. 字幕の表示/非表示

    日・英のボタンをクリックすることで自由に字幕のオンオフを切り替えられます。

  5. 5. 動画をブログ等でシェア

    コードを貼り付けてVoiceTubeの動画再生プレーヤーをブログ等でシェアすることが出来ます!

  6. 6. 全画面再生

    左側の矢印をクリックすることで全画面で再生できるようになります。

  1. クイズ付き動画

    リスニングクイズに挑戦!

  1. クリックしてメモを表示

  1. UrbanDictionary 俚語字典整合查詢。一般字典查詢不到你滿意的解譯,不妨使用「俚語字典」,或許會讓你有滿意的答案喔