This book explores in depth the hidden dangers of pesticides, with a particular focus on thiacloprid, a neonicotinoid insecticide widely used in modern agriculture. The book examines the potential dangers that this pesticide poses to human and animal health, particularly through recent studies that highlight its toxic impact, even at low doses of exposure. At the same time, the book offers a comparative analysis of biopesticides, natural alternatives to chemical pesticides. While recognising the advantages of biopesticides, such as their lower environmental impact and greater selectivity, the book also discusses their limitations, such as their often reduced efficacy and higher production costs. The book aims to provide a balanced and critical overview of the options available for pest control, and offers food for thought on the future of farming practices and the need for a transition to safer solutions for humans, animals and the environment.