Summary:

- The article explores the life and work of James Lovelock, the scientist who developed the Gaia theory, which proposes that the Earth is a self-regulating system where living organisms interact with their inorganic surroundings to form a complex, interdependent system.

- Lovelock's Gaia theory has had a significant impact on the field of environmental science, as it challenges the traditional view of the Earth as a passive, inert planet and instead sees it as a living, breathing organism that responds to changes in its environment.

- The article also discusses Lovelock's long and productive career, which spanned over eight decades, and his continued influence on the scientific community's understanding of the Earth's complex systems and the role of living organisms in shaping the planet's environment.