Mathitat
Serious maths,
gently done.

Able to continue without using up resources.

In Español · sample
SostenibleQue puede continuar sin agotar los recursos.

Sustainable = can keep going without running out.

✓ Cutting 50 trees a year and planting 60 — the forest keeps going.

✗ Cutting 50 a year and planting none — it runs out.