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Abstract

In a world where chemicals are present in virtually every aspect of our daily lives, from food and medicines to cleaning products and cosmetics, it is essential to question a widely held belief: are there really completely safe chemicals? The answer is clear: no. Every chemical compound has the potential to become poisonous depending on factors such as dose, prolonged exposure, environmental conditions, and individual susceptibility. This presentation explores how toxicity is not an inherent quality, but rather a relative one. Through historical examples and current cases, we will analyze how substances initially considered safe or even beneficial have turned out to be harmful over time. From lead in paints to agricultural pesticides and endocrine disruptors in plastics, these cases demonstrate that the line between what is safe and what is dangerous is much thinner than it appears. Furthermore, we will address the precautionary principle, underscoring the need to critically assess risks before adopting new technologies or substances. We will also emphasize the importance of effective regulation, scientific transparency, and public education to minimize potential harm. Ultimately, this talk seeks to inspire ethical reflection on our use of chemicals, promoting sustainable practices and responsible innovations that prioritize both human health and environmental protection. Ultimately, this message invites us to rethink our relationship with chemicals and remember that, in human hands, any substance can become a double-edged sword. The conclusion is clear: safety depends not only on chemicals, but on how we manage them.