At the second Earth summit in Johannesburg in 2002, it was agreed that there was an urgent need to inform and educate persons about ways of adapting to more sustainable life styles and the decade from 2005 to 2015 has been declared by UNESCO the decade of Education for Sustainable Development (or ESD).
Teisel keskkonnaalasel tippkohtumisel Johannesburgis 2002. aastal jõuti ühisele arusaamisele, et on tungiv vajadus teavitada ja harida inimesi jätkusuutlikumate eluviiside osas; ajavahemiku 2005-2015 on UNESCO kuulutanud säästvat arengut toetava hariduse dekaadiks.