What does the Seven Deadly Sins talk about? Thank you for the title

The Seven Deadly Sins was a novel by Huxley, a British writer. It was a continuation of When the Human Stars Shine. The novel mainly talked about the crisis of human civilization facing extinction due to environmental pollution, nuclear war and other factors. In order to save mankind, a group of scientists invented the "Purification Plan" in the hope of saving mankind by purifying the environment. However, in the process of implementing the purification plan, the scientists suffered various betrayals and sacrifices, and finally succeeded in saving mankind. However, mankind has fallen into a new predicament because the implementation of the purification plan has led to serious environmental pollution, and the survival of mankind has also been threatened. Through the encounters of scientists, the novel explored the regress of human civilization, the destruction of the environment, and the responsibility of human beings.