Environmental activist Bill McKibben, known for his dire climate warnings, has found a reason for optimism in the rapid growth of solar power.
McKibben, who wrote The End of Nature in 1989, a seminal book on global warming, has been a persistent voice on environmental issues, organizing protests against fossil fuel industries.
His outlook was once described as "dark realism."
However, the significant expansion of renewable energy, particularly solar power, has led McKibben to adopt a more optimistic stance on the potential to slow climate change.
Author's summary: Bill McKibben finds hope in solar power growth.