The document contains links to various online resources about the topics of concept, author opinion, personal link, sustainable development, and the United Nations. It includes embedded videos from different people giving their perspective on these topics in Spanish.

1. CONCEPTO AUTOR OPINION PERSONAL LINK
http://youtu.be/gLoC0WIk08E
Mark koller
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www.un.org/es/
https://docs.google.com/document/d/1SGKYiK6
8gx9rflsZmApbRg-GfjSpxV8_p9-7p9QKPhA/pub Abasí Jano http://Pixton.com/es/:fze9kbv2 www.disost.com
https://docs.google.com/document/d/1CEI4Ami
TYDkwStfcgyJRHqFkiRONzg3FIMIHx4cs_YQ/pu
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Carlos Ramírez
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www.disost.com

2. DESARROLLO SOSTENIBLE
http://Pixton.com/es/:p9b9pntx Mario Sánchez
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www.unesco.orgv