Extreme Heat and Tooth Decay, The Problem with Plastic, National Parks Magic and more.

The extreme heat that’s becoming far more common in a warming world is now being linked to dental problems. As the body prioritizes sweat for cooling over saliva production, the resulting dry mouth can have devastating impacts on your teeth, and a dentist in Pakistan is documenting a tooth decay trend among his patients who work outdoors in the heat for prolonged periods.

Also, cheap and convenient plastic products are everywhere you turn, and the microplastics they break down to are now in our water, soil, air, and deep inside our bodies. Joining us to discuss her 2025 book The Problem with Plastic: How We Can Save Ourselves and Our Planet Before It’s Too Late is Judith Enck, a former EPA Regional Administrator and the founder and President of the advocacy group Beyond Plastics.

Plus -- it’s peak summer travel season, and for many people traveling in the US that means a visit to a national park or monument. After all, "America's crown jewels” are ideal places to disconnect and reconnect with nature and our shared history. Will Shafroth, recently retired CEO of the National Park Foundation, takes a virtual road trip of sorts with us to share the magic of the national parks. Learn more about your ad choices. Visit megaphone.fm/adchoices