B2IELTS-style · Band 5.5–6.5Writing55 min

IELTS Writing: Green Roofs and Urban Heat

Green roofs and urban heat

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How to Use This Lesson

For the Teacher

• Allocate 55 minutes total for this 3-module unit, starting with Module 1 to establish core vocabulary and target structures.

• Check students' progress on word forms and verb patterns before they proceed to independent writing in Module 2.

For the Learner

• Complete Module 1 first to master unit vocabulary, useful essay phrases, and essential verb patterns.

• Read the explanations carefully after answering to ensure you can apply these structures in your essay.

Module 1 • Build-Up Practice

Build Your Skills First

Master unit vocabulary, collocations, essay transitions, and the target grammar structure before starting your essay.

Part A

Word Forms

Complete each sentence with the correct form of the word in brackets.

1. Rooftop plants act as effective thermal insulate, keeping top-floor rooms cooler.

Your word: ____

2. Natural cooling occurs when water loss takes place through evaporate from leaves.

Your word: ____

3. Without shade from vegetation, uninsulated concrete structures suffer from severe overheat during heatwaves.

Your word: ____

4. During peak summer months, dark paved streets sweltering under direct sunlight.

Your word: ____

5. Introducing proper roof ventilation and greenery helps eliminate indoor stuffy in apartments.

Your word: ____
Part B

Collocations

Choose the correct unit word that naturally pairs with the surrounding words.

6. During ________ summers, urban areas become significantly hotter than nearby rural districts.

____ a. sweltering ____ b. stuffy ____ c. mossy ____ d. insulated

7. Uncovered ________ roads absorb solar radiation and release trapped thermal energy slowly at night.

____ a. gutter ____ b. asphalt ____ c. greenery ____ d. rooftop

8. Heavy rainwater cannot drain properly if the rooftop ________ is blocked with dry leaves.

____ a. moss ____ b. gutter ____ c. asphalt ____ d. insulation

9. Top-floor rooms with small windows often feel ________ and airless in mid-summer.

____ a. stuffy ____ b. mossy ____ c. lush ____ d. bare

10. A thick layer of green ________ helps retain moisture and protect rooftop soil from drying out.

____ a. asphalt ____ b. gutter ____ c. moss ____ d. heat
Part C

Common Essay Phrases

Select the correct phrase from the bank to complete each essay context (use each phrase once).

Word Bank: As a result For instance In my view On the other hand In addition

11. ________, city authorities ought to mandate plant coverage on all newly constructed commercial buildings.

Function: Giving your opinion

____ a. As a result ____ b. For instance ____ c. In my view ____ d. On the other hand ____ e. In addition

12. Dark concrete roofs absorb immense amounts of solar radiation during the daytime. ________, downtown temperatures rise significantly.

Function: Showing a consequence or result

____ a. As a result ____ b. For instance ____ c. In my view ____ d. On the other hand ____ e. In addition

13. Rooftop gardens offer undeniable environmental benefits. ________, the initial setup expenses can be substantial for property owners.

Function: Introducing a contrasting point

____ a. As a result ____ b. For instance ____ c. In my view ____ d. On the other hand ____ e. In addition

14. Plants lower indoor cooling demands effectively. ________, they absorb rainwater, reducing pressure on drainage systems.

Function: Adding an additional supporting argument

____ a. As a result ____ b. For instance ____ c. In my view ____ d. On the other hand ____ e. In addition

15. Green roofs can be used in many ways. ________, owners can grow herbs, flowers or small trees on them.

Function: Presenting a specific example

____ a. As a result ____ b. For instance ____ c. In my view ____ d. On the other hand ____ e. In addition
Part D

Paraphrase Practice

Select the option that best rewrites the original sentence using different words or structure without changing the meaning.

16. Original Sentence:

"Covering roofs with plants prevents buildings from overheating."

____ a. Installing rooftop greenery keeps structures from becoming excessively hot. ____ b. Planted roofs cause buildings to absorb higher amounts of heat during summer. ____ c. Overheated roofs are necessary in order to grow healthy urban plants.
17. Original Sentence:

"Asphalt roads absorb large amounts of heat during hot weather."

____ a. Hot weather makes asphalt roads reflect heat away from urban centers. ____ b. In sweltering weather, dark road surfaces take in large amounts of thermal energy. ____ c. Asphalt surfaces keep cities cool when weather conditions become sweltering.
18. Original Sentence:

"Many urban residents consider rooftop gardens relaxing."

____ a. City dwellers find green roofs peaceful places to spend time. ____ b. Rooftop gardens leave urban residents feeling stressed and uncomfortable. ____ c. Installing gardens on roofs makes residents consider moving away.
Part E

Grammar Focus & Quick Practice

Review the pattern below, then choose the verb that fits each context.

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Target Structure: Verb + Object + Adjective

Use make, keep, leave, find, and consider followed directly by an object and an adjective. Do NOT insert to be or that.

1. State Change (make)

• Hot summers make cities uncomfortable.

2. State Maintenance (keep)

• Green roofs keep buildings cool.

3. Unchanged / Neglected State (leave)

• Do not leave the soil dry.

4. Opinion / Perception (find / consider)

• Residents find the garden relaxing.

⚠️ Key Rule: Write "It keeps rooms cool" (NOT "It keeps rooms to be cool").

19. Rooftop vegetation helps to ________ building interiors cool throughout sweltering summer heatwaves.

Context: Holding/maintaining a state of coolness

____ a. find ____ b. keep ____ c. leave

20. Unshaded asphalt streets can ________ living in dense urban centers uncomfortable during July.

Context: Changing a state (causing discomfort)

____ a. make ____ b. find ____ c. leave

21. Many urban planners ________ green roof requirements necessary for modern sustainable development.

Context: Expressing an opinion or judgment

____ a. leave ____ b. keep ____ c. consider
Module 2 • The Writing Task

Write Your Essay

Apply the vocabulary, transition phrases, and grammar structures you practiced in Module 1 to construct your complete IELTS Writing Task 2 response.

IELTS Writing Task 2 Prompt

"Some cities now require the owners of new buildings to cover part of the roof with plants. Do the advantages of this outweigh the disadvantages?"

🎯 Task Requirements

  • • Write at least 250 words.
  • • Use at least 3 sentences with the target grammar pattern (make, keep, leave, find, consider + object + adjective).
  • • Include at least 5 Unit vocabulary words (rooftop, moss, greenery, gutter, insulate, evaporate, overheat, asphalt, sweltering, stuffy).
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4-Paragraph Essay Plan

Use these exact paragraph openers to structure your essay clearly:

Paragraph 1 • Introduction

"In this essay I will discuss ..."

Paragraph 2 • Advantages

"One advantage is ..."

Paragraph 3 • Disadvantages

"However, one disadvantage is ..."

Paragraph 4 • Conclusion

"In conclusion, ..."

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Self-Check Checklist

Check each item off before submitting your essay:

____ 1. Word Count: My essay contains at least 250 words. ____ 2. Unit Vocabulary: I incorporated at least 5 words from the Unit word list. ____ 3. Target Grammar: I included at least 3 sentences using the target grammar pattern (make, keep, leave, find, consider + object + adjective). ____ 4. Essay Structure: I organized my response into 4 paragraphs using the required sentence starters.

Write Your Essay Response

Type your complete essay below. Write at least 250 words.

Evaluation Criteria: Task Response Coherence and Cohesion Lexical Resource Grammatical Range and Accuracy
____ (In this essay I will discuss...)

🌟 Module 3 • Model Essay

Read the model essay below. The bold parts show the pattern from this lesson, and the note under each one says why it works.

In this essay I will discuss whether the advantages of asking owners of new buildings to cover part of the roof with plants outweigh the disadvantages. In my view they do, although the idea is not perfect. I will look at the benefits first and then at the problems.

One advantage is that greenery keeps the top floor cool in the summer.Pattern: keep + object + adjective. Write cool, not to be cool. On a sweltering day a bare rooftop can overheat, but a layer of plants and moss helps to insulate the rooms below it, so people use less air conditioning. Water in the soil can also evaporate, which makes the air around the building fresher.Pattern: make + object + adjective. The adjective comes straight after the object. Many people also find a rooftop garden relaxing, because it gives them a quiet place to sit during the day.Pattern: find + object + adjective. It gives a personal opinion.

However, one disadvantage is that a green roof costs more than a normal roof. The owner has to pay for the soil, the plants and the workers, and the roof needs regular care. The plants also need water in a dry summer, and that costs money too. If nobody cleans the gutter, leaves can block it and the water stays on the roof. Some owners may consider these costs unfair, especially owners of small buildings.Pattern: consider + object + adjective. It sounds a little more formal than find. Bad care can leave the soil dry, and then the plants die.Pattern: leave + object + adjective. Nobody changes the state, so it stays dry.

In conclusion, I believe the advantages are stronger than the disadvantages. A roof with plants is much nicer than a hot asphalt roof, and it makes the city less stuffy in summer.Pattern: make + object + adjective. Here less goes in front of the adjective. The cost is a real problem, but I think the rule is worth it if owners get some help.

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