Eating Well on a Changing Planet: C1 English Lesson
This C1 English lesson on sustainable healthy diets examines how nutrition, cost, culture, and environmental impact are assessed together, and why improving one dimension can create a trade-off elsewhere. It builds vocabulary for trade-offs, provision, and constraint, and practices concessive yet and and yet to hold two competing claims in a single sentence.
Vocabulary
KEY WORDS
trade-off (noun)
An acceptable loss in one area in exchange for a gain in another.
Choosing the cheaper flight meant a trade-off in comfort.
Synonyms: compromise, balance
to reconcile (verb)
To make two conflicting things fit together.
It is hard to reconcile the two witnesses’ accounts.
Synonyms: to bring together, to square
provision (noun)
The act of supplying something people need.
The council improved provision for cyclists on the main road.
Synonyms: supply, delivery
staple (noun)
A basic food that forms a large part of what people usually eat.
Rice is a staple in many households, where it appears at most evening meals.
Synonyms: mainstay, basic
constraint (noun)
Something that limits what can be chosen or done.
Time was the main constraint, so the team chose a simpler design.
Synonyms: limitation, restriction
arable (adjective)
Suitable for growing crops.
Only a small part of the island is arable; farmers use that land for vegetables.
Synonyms: cultivable, farmable
universal (adjective)
Intended to apply to every person or situation.
The rule is not universal; two departments are exempt.
Synonyms: general, all-purpose
IDIOMS
to square the circle (idiom)
To try to do two things that seem impossible together.
Feeding cities cheaply and sustainably can look like an attempt to square the circle.
Synonyms: to reconcile the irreconcilable, to achieve the impossible
to move the goalposts (idiom)
To change the standard something is measured against.
Each new target moved the goalposts for producers.
Synonyms: to change the criteria, to shift the standard
READ · LISTEN · NOTICE
Eating Well on a Changing Planet: C1 English Lesson
Read at your own pace, or play the audio and follow the passage. Listen again without reading for additional practice.
Most dietary advice focuses on what keeps a population healthy. The WHO and FAO include three more questions. Is the pattern environmentally sustainable, is it culturally acceptable, and can people afford it? These goals do not always agree. Governments must reconcile them under local conditions rather than follow one diet.
Four dimensions, one plate
National guidelines show how the same principles lead to different advice. Sweden encourages more root vegetables, cabbage, beans, and whole grains. It names rapeseed oil as a useful cooking fat and asks consumers to select seafood with an ecolabel. Brazil takes a different approach. Its advice tells people to base meals on natural or lightly processed foods and to develop and share cooking skills. It also recommends shopping where varied fresh foods are available and choosing freshly prepared meals when eating out. Although both versions link health with sustainability, they do not provide a universal menu.
The point is not that every goal conflicts. Focusing on one alone can harm another. A low-emissions diet might be unaffordable. A cheap one might be nutritionally poor. A familiar pattern might put too much pressure on scarce arable land or water.
Patterns, not foods
The dietary pattern, not individual foods, is the unit of assessment. A food that performs poorly on one criterion may still have a useful place in a pattern that performs well overall. That is the reason why the principles do not provide approved and forbidden lists of foods, even though such lists are often included. Lists are easier to handle than a framework.
Whose constraint binds
Affordability and cultural acceptability are central. Advice a household cannot afford is not practical. A staple that a community will not eat feeds nobody. Advice that fails to account for these factors applies only to people who already have money and choices. Useful guidance acknowledges these difficulties, yet still advises action.
The Brazil–FAO Sustainable Schools program conveys the same message through the public provision of school meals. The programs combine school food that is both nutritious and culturally appropriate with school gardens and direct buying from family farms. The menu is only one element. Kitchens, growers, storage facilities, budgets, and students’ preferences all affect whether the meal can be served regularly.
GRAMMAR FOCUS
Concessive yet and and yet
[claim] , yet [contrasting claim] · [claim] , and yet [contrasting claim] · [adjective] yet [adjective] + [noun]
Yet concedes the first claim and then sets a second against it without withdrawing the first. It is stronger than but: where but simply contrasts, yet signals that the contrast is surprising or uncomfortable, and that both halves stand. And yet gives that unexpected contrast extra weight while still coordinating the two clauses.
- Mid-sentence yet: both claims remain true
“The pattern is affordable, yet almost nobody adopts it.”
“The older machine is slower, yet it breaks down far less often.”
- And yet between clauses: the contrast carries emphasis
“Every dimension was measured, and yet the recommendation satisfied none of them completely.”
“The warning signs were on file for a decade, and yet nobody acted on them.”
- Yet between coordinated phrases
“She wanted a demanding yet manageable schedule.”
“A sustainable diet must be affordable yet nutritionally adequate.”
Discuss the ideas
Work through the discussion questions on your own, or with a teacher or partner.
- Which of the four dimensions tends to be dropped first when a food policy meets political resistance?
- Why might a recommendation that is nutritionally sound still fail entirely in practice?
- Where should responsibility for affordability sit — with households, retailers, or the state?
- What is lost when coverage of dietary guidance reduces it to a list of good and bad foods?
- How should guidance be written for populations whose staples differ completely from one another?
What this sustainable diets English lesson developed
This C1 English lesson examined how nutritional adequacy, environmental impact, cultural acceptability, and affordability are weighed together, and why improving one can create a cost elsewhere. It built vocabulary for trade-offs, constraint, and provision, and practiced concessive yet and and yet to hold competing claims in one sentence without abandoning either.
Next lesson: Survivorship Bias
CONTINUE PRACTICING
Continue with the slide collection
Turn this lesson into a class-ready sequence with a warm-up, two vocabulary activities, a five-question reading check, original listening practice, controlled and spoken practice of concessive yet, and an IELTS Part 3 discussion with model answers.
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