Drones show wastewater plants emit more greenhouse gases than expected
Wastewater plants emit 2.5x more methane and nitrous oxide than estimated, drones reveal.
Why it matters
- Wastewater plants emit significantly more greenhouse gases than thought.
- Challenges existing IPCC climate models.
- Sludge storage identified as key emission source.
By the numbers
- Emissions 2.5x higher than IPCC estimates.
- 12 Swedish plants studied; nitrous oxide has 300x CO₂'s warming potential.
The big picture
- Current models underestimate wastewater plant emissions.
- Direct measurements could improve climate tracking.
What they're saying
- Comments note expectation of high pollutants in wastewater.
- Study suggests IPCC needs updated emission factors.
Caveats
- Limited to Swedish plants; global applicability uncertain.
What’s next
- Better monitoring and emission-reduction tech needed.