IB · ESS

IB Environmental Systems and Societies

Connect scientific and societal perspectives on ecosystems, resources, pollution and sustainability, then choose SL or HL for exact resources.

Environmental systems through science and society

IB Environmental Systems and Societies is an interdisciplinary course combining methods and knowledge from the sciences and individuals and societies.

It connects ecological systems, biodiversity, water, land, climate, natural resources and human populations with environmental perspectives and sustainability decisions.

Choose a level to open study resources

Question Bank, Mastery, Concept and Documents links become available after SL or HL is selected.

Choose your ESS level

Select SL or HL before opening level-specific assessment, syllabus and study resources.

IB ESS questions

What course version does this page use?

This page follows the IB Environmental Systems and Societies guide for first assessment in 2026.

Why is ESS interdisciplinary?

It examines environmental systems using both scientific methods and societal perspectives, including decisions about resources and sustainability.

What changes at HL?

HL adds greater depth and distinct lenses in environmental law, economics and ethics, together with a different assessment structure.

Why must I choose SL or HL first?

The levels have different papers, timings, weightings and syllabus depth, so a level is required before opening resources.