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Showing posts with the label nutrient pollution

Every time you flush the toilet, you may be inadvertently contributing to a global environmental crisis: wastewater pollution. Eighty percent of the world's wastewater enters our waterways without adequate treatment — and the repercussions are critical for both human and ecological health.

Tune in to waste(d)water, a first-of-its-kind podcast from The Nature Conservancy, to hear from experts across disciplines and geographies, so we can unpack wastewater pollution and learn about the solutions to tackle it. From resource recovery to nature-based solutions, we can reshape how we perceive and manage wastewater.

Listen to the podcast on your favorite streaming platforms:

EPISODE TWO: SHOW NOTES

Dilution may not be the solution: The global footprint of wastewater pollution 

 Featuring Dr. Ben Halpern (UC Santa Barbara) and Dr. Cascade Tuholske (Montana State University)


LISTEN ON:     Apple Podcasts    ◦    Spotify    ◦    YouTube



DESCRIPTION
Where does our wastewater really go—and what is it doing to our oceans? In this episode of The Nature Conservancy’s waste(d)water podcast, host Kassie Morton speaks with Drs. Cascade Tuholske and Ben Halpern about their groundbreaking global model that maps nitrogen and pathogen pollution from human sewage for over 135,000 watersheds. Discover how 25 of these watersheds contribute nearly half of the world’s wastewater nitrogen, why even advanced treatment systems can harm ecosystems, and how our diets play a surprising role. This eye-opening conversation reveals the hidden scale of wastewater pollution and offers hope through data-driven solutions for healthier oceans and communities.


KEY WORDS
wastewater pollution, ecological health, nutrient pollution, marine ecosystems, wastewater management, public health, environmental health, global analysis, nitrogen inputs, conservation strategies


AT A GLANCE

  • Wastewater pollution has been largely underestimated.
  • 80% of the world's wastewater is discharged untreated.
  • 25 watersheds are responsible for nearly half of global nitrogen inputs.
  • Wastewater contributes significantly to coastal nutrient pollution.
  • Agricultural runoff is often prioritized over wastewater pollution.
  • Improving sanitation is essential for public health.
  • Dietary choices, especially protein consumption, impact wastewater pollution.
  • Understanding the sources of wastewater is crucial for effective solutions.
  • Communities can leverage research to address local wastewater issues.
  • Collaboration across sectors is key to solving wastewater challenges.


GUEST BIOS

Dr. Cascade Toholske is Assistant Professor at University of Montana where he teaches human-environment geography, climate change risks and impacts, and geospatial data science for sustainability. With a Ph.D. in geography, his research focuses on linkages between climate change, food security, and urbanization.

Dr. Ben Halpern is Professor of Marine Biology and Conservation Science at the Bren School of Environmental Science & Management at UC Santa Barbara and Director of the National Center for Ecological Analysis and Synthesis. With a Ph.D. in marine ecology, Dr. Halpern is a conservation scientist with broad, interdisciplinary expertise in climate change science, ecology and evolution and marine conservation, policy and education.


CHAPTERS

00:00 Understanding Wastewater Pollution's Ecological Impact
02:29 The Global Scope of Wastewater Pollution
05:10 Sources and Consequences of Nutrient Pollution
08:31 Wastewater Management Disparities
11:22 Key Contributors to Global Wastewater Nitrogen Inputs
14:18 Comparing Wastewater and Agricultural Runoff
17:27 Infrastructure and Its Role in Pollution
20:06 Future Research Directions
23:20 Balancing Public Health and Environmental Health
26:07 Community Solutions and Global Collaboration
29:16 Individual Actions and Dietary Considerations
31:40 Final Thoughts on Wastewater Management



EPISODE RESOURCES

Mapping Global Inputs and Impacts from Human Sewage in Coastal Ecosystems
Tuholske et al., PLOS One, 2021
Read the article

Wastewater Pollution: The Problem - Scale of Pollution
Ocean Sewage Alliance
Explore the resource

Wastewater Pollution Impacts on Estuarine and Marine Environments
Treatise on Estuarine and Coastal Science, 2nd Edition – Chapter 6.13
Access the chapter

Sewage pollution: mitigation is key for coral reef stewardship
Wear & Vega Thurber, 2015
Read the paper

Water, Sanitation, Hygiene, Environmental Cleaning and Waste Management in Health Care Facilities
UNICEF & WHO, 2020 – 2023 Data Update
View the report

Identifying Wastewater Management Tradeoffs in Kona, Hawai‘i
Wada et al., PLOS One, 2021
Read the article


CREDITS
Post-production services for waste(d)water provided by Two Aspen Audio. A special thank you to The Nature Conservancy Coda Fellows Sydney Bezanson and Juan Sebastián Gómez Gutiérrez for their contributions.
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