Regenerate: Nature Can Help Heal the Planet | An Optimist’s Guide to the Planet

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Solutions for Environmental Challenges

The show focuses on solutions and the people behind them, aiming to preserve the natural beauty of the world.
Nikolaj Coster-Waldau visits Fukushima, Japan, where nature is showing incredible resilience despite radiation contamination, and the Japanese people are determined to rebuild.
Katsumi, a farmer who lost everything in the Fukushima disaster, chose to grow flowers instead of vegetables due to regulations and reputational concerns, driven by his strong attachment to the land and responsibility as the oldest son of his family.
Sargassum seaweed, which has become an invasive species due to climate change, can be harvested and compressed into bales that can be sunk to the bottom of the ocean to store carbon for thousands of years, potentially generating carbon credits.
Plastic pollution is a significant problem, with only 10% of plastic waste being recycled globally.
Frederica Bertocchini, a molecular biologist, discovered that wax worms can naturally degrade plastic through enzymes in their saliva, and her company, Plasticentropy, aims to develop solutions based on this discovery.
The Great Barrier Reef is facing threats due to rising sea temperatures, but progress has been made in understanding and managing coral reefs, including the use of remote-controlled underwater vehicles for studying and monitoring, coral nurseries for propagation and fragmentation, and inducing coral spawning on demand to scale up restoration efforts.

The speaker visits the Great Barrier Reef and highlights the importance of coral reefs and the threats they face due to rising sea temperatures.
The speaker showcases SeaSim, a facility that uses remote-controlled underwater vehicles to study and monitor coral reefs.
The speaker discusses the progress made in understanding and managing coral reefs and the efforts to intervene and restore damaged reefs.
The speaker visits a coral nursery where corals are propagated and fragmented to help restore the reef.
The speaker learns about the process of inducing coral spawning on demand by manipulating environmental variables such as moonlight and sea temperature.
Red light is used instead of white light to avoid disrupting the corals' period of darkness.
White balls, which are egg and sperm packets, are pushed out of the coral during spawning.
The positively buoyant egg and sperm packets rise to the surface and are collected in cups.
The collected packets can be used to scale up coral restoration efforts and increase the opportunity for reef restoration.
The speaker expresses optimism and hope for the future of coral reef conservation based on the small changes that have been made and the passion of those working in the field.