AIC2020 International Symposium on "Natural Colours -- Digital Colours" br Session 22 COLOUR, ENVIRONMENT and SUSTAINABLE DEVELOPMENT, Sustainability, health, biodiversity, lifespace, landscape, urban planning, building materials, etc. — Second Part (End). Chairwoman: Sonia Ovarlez (CFC) br br Camila Silva: Art with soil: Geotinta Project and its contribution to the teaching and usingof colors in Design.