This letter, written in the year 2070, describes a dystopian future where water scarcity has led to societal collapse. The author, now 50 years old, suffers from kidney problems due to dehydration. Trees and vegetation have disappeared, rivers and lakes are dry, and underground water sources are contaminated. People are only allowed half a glass of water per day and use mineral oil and disposable clothing due to the lack of water. Skin cancer and infections are widespread, and the population appears horribly emaciated and wrinkled. Younger people now look middle-aged due to excessive skin drying. The environment is severely degraded, rain is acidic, and life on Earth will soon be impossible. The author feels guilty