David Pereira, Portuguese citizen, born in Angola, Civil Engineer (FCTUC), eqMSc Sanitary Engineer (IHE, Delft, The Netherlands), PhD in environmental systems optimization (New University of Lisbon), Professor at the New University of Lisbon lecturing and researching sanitary engineering and construction sustainability, founder and partner of Adductio, Lda, a Portuguese consulting enterprise working in Europe, Africa and Latin America, author of bestseller commercial engineering software. [email protected]