Liquid air batteries, dolphins saved by plastic bottles, and an empty weekend a month

Dolphins fatally swim into fishing nets because the nylon is acoustically too similar to water for their echolocation to pick up. A researcher at Newcastle University wondered if attaching something that does produce an echo might change that. The dolphin-saving solution may surprise you. Ten solutions this week with Arielle and Karissa. Also in the episode: energy storage technologies that sound like science fiction but are getting serious investment, India's first domestically built hydrogen train, and the garden sign that looks like a win but means your plant is struggling to survive. Stay tuned til the end for a wonderful Emissary Shout-Out that will brighten your day! Transcript link: https://www.optimistdaily.com/?p=1422684 If you have questions, comments, feedback, suggestions, or just want to say hi, send a message to: [email protected]. Want to be part of the Optimism Movement? Become an Emissary. Subscribe to our FREE Daily/Weekly Newsletter and follow us on Instagram, X, and Blue Sky. The Optimist Daily is a project of the World Business Academy. Donate link: https://www.optimistdaily.com/donate-to-support-the-optimist-daily/?lsc=41ef528d Theme and all original music by Marvin Lanes