Aimnova
DashboardMy LearningStudy Plan

Stay in the loop

Study tips, product updates, and early access to new features.

Aimnova

AI-powered IB study platform with personalised plans, instant feedback, and examiner-style marking.

IB Subjects

  • IB Diploma
  • All IB Subjects
  • IB ESS
  • IB Business Management
  • Grade Calculator
  • Exam Timetable 2026
  • ESS Predictions
  • BM Predictions

Study Resources

  • Free Study Notes
  • Revision Guide
  • Flashcards
  • ESS Question Bank
  • BM Question Bank
  • Mock Exams
  • Past Paper Feedback
  • Exam Skills
  • Command Terms

Company

  • Features
  • Pricing
  • About Us
  • Blog
  • Contact
  • Terms
  • Privacy
  • Cookies

© 2026 Aimnova. All rights reserved.

Made with 💜 for IB students worldwide

v0.1.103
NotesESS HL
All Subjects

IB ESS HL HL Notes

Environmental Systems and Societies

Aimnova provides free IB ESS Higher Level revision notes for the 2024–2029 syllabus, covering all 8 units plus HL-specific extensions including Environmental Law, Ecological Economics, and Environmental Ethics. Each topic features detailed notes, key definitions, exam tips, flashcards, and practice questions with AI feedback.

IB ESS Higher Level extends the Standard Level course with deeper analysis, additional research methodologies, and three HL lenses. HL students face longer papers and must demonstrate more sophisticated evaluation skills.

Use the unit-by-unit structure below to revise systematically and ensure no HL-only material is missed before Paper 1 and Paper 2.

What's included

  • 30+ topics across 8 units, aligned to the IB 2024–2029 syllabus
  • Concise notes with definitions, diagrams, and real-world examples
  • Spaced-repetition flashcards for every topic
  • IB-style practice questions with AI marking and feedback
  • SL and HL coverage with level toggle
  • Free to access — no account required for notes

How to use ESS HL notes

  1. 1Start with a unit overview. Click any Unit heading to see all topics and key themes for that unit.
  2. 2Read micro-topic notes. Each topic links to detailed, exam-aligned notes with definitions, diagrams, and examples.
  3. 3Test with flashcards. Every topic has spaced-repetition flashcards to lock key terms into your memory.
  4. 4Practise exam questions. Apply what you know with practice questions and get AI feedback on your answers.
ESS SL NotesESS Exam Skills (HL)ESS Revision Guide

Unit 1: Foundations of ESS

1.1Environmental systems
1.2Models, Systems and Loops
1.3Equilibrium, stability and resilience
1.4Sustainability

Unit 2: Ecosystems and Ecology

2.1Species, populations
2.2Communities and ecosystems
2.3Habitat, niche and interactions
2.4Food chains & webs and trophic levels
2.5Flows of energy and matter
2.6Human impacts
2.7Biogeochemical cycles
2.8Biomes, zonation, succession

Unit 3: Biodiversity, Conservation and Change

3.1Biodiversity
3.2Natural selection, variation and speciation
3.3Threats to biodiversity
3.4Conservation strategies
3.5Protected areas, corridors
3.6In situ vs ex situ conservation

Unit 4: Water and Aquatic Food Production

4.1Water systems
4.2Water access, use and security
4.3Aquatic food production systems
4.4Water pollution

Unit 5: Soil Systems and Terrestrial Food Production

5.1Soil systems
5.2Agriculture and food

Unit 6: Atmospheric Systems and Societies

6.1Introduction to the atmosphere
6.2Climate change—causes and impacts
6.3Climate change—mitigation and adaptation
6.4Stratospheric ozone

Unit 7: Climate Change and Energy Production

7.1Natural resources—uses and management
7.2Energy sources—uses and management
7.3Solid waste

Unit 8: Human Systems and Resource Use

8.1Human populations
8.2Urban systems and urban planning
8.3Urban air pollution

Unit 9

9.1Environmental Law
9.2Environmental Economics
9.3Environmental Ethics

Want practice questions & AI feedback?

Sign up free to access MCQs, exam-style questions, and personalised study plans.

Start Studying Free

No credit card required · Cancel anytime