Class 8 Science | Sustainable Development

Science and Technology, Class 8

Sustainable Development

Four sides in balance · Brundtland Commission, 1987 · Today's and tomorrow's people

What We Will Learn Today

🛣️

Understand why a road cut into a steep slope collapses

⚖️

Name the four sides of sustainable development

📜

State the Brundtland Commission's definition

🏘️

Show all four sides in a model of a clean village

⛏️The road that fails

No drain is cut for the water

The cut face has nothing holding it

Spoil is tipped loosely down the hill

It slips in the first monsoon

🌿The road that lasts

Drains run along both edges

Walls and frames hold the slope

Deep rooted plants are put in

It serves for many years

The notes are free to read in full.

Presenter notes: Ask the class how long a road or a bridge near their home has lasted. Today's lesson starts from exactly that question.