salt
Cloud brightening experiment in California temporarily stopped
Local officials in California have halted a cloud brightening experiment due to potential health concerns, as researchers tested a technology to combat global warming by reflecting sunlight.
In short:
- The University of Washington researchers were using a device to spray sea-salt particles on the U.S.S. Hornet to increase cloud reflectivity.
- The experiment began on April 2 and was the first of its kind conducted outdoors in the U.S.
- Alameda city officials demanded a halt on May 4, requesting further review of the experiment's health and environmental impacts.
Why this matters:
Geoengineering solutions like cloud brightening are being considered to manage the Earth's temperature amidst rising global greenhouse gas emissions. While offering potential short-term relief, they also pose significant scientific and ethical questions, emphasizing the ongoing struggle to balance technological intervention with natural climate solutions.
Related EHN coverage:
Warm winter leads to a significant decrease in road salt usage in Michigan
Michigan experiences a reduction in road salt application, benefiting budgets and the environment.
In short:
- Michigan's mild winter resulted in a 37% drop in road salt usage on state highways.
- This decrease may save the state approximately $10 million and mitigate environmental impacts.
- Experts suggest that warmer winters could reduce the future need for road salting.
Key quote:
"We’ve been trying to make a conscious effort to reduce our salt use."
— Tim Croze, statewide maintenance and operations manager for the Michigan Department of Transportation
Why this matters:
Runoff containing road salt can infiltrate freshwater systems, leading to elevated salinity levels in lakes, rivers and groundwater. This increase in salinity can disrupt aquatic ecosystems, harming or even killing plants and wildlife adapted to freshwater environments.
Native Hawaiian salt makers combat climate change and pollution to protect a sacred tradition
Louisiana panel blocks new water wells over salt concerns
State regulators rejected three new wells amid concerns that more pumping could cause underground saltwater to contaminate Baton Rouge-area drinking water — despite arguments that the extra capacity is needed.
Salt continues slow contamination of Baton Rouge fresh water
The saltwater wedge moving up the Mississippi River has cities downriver of Baton Rouge on high alert to keep supplied with fresh drinking water.
Listen: Mississippi River infrastructure needs and climate change
Lock and dam infrastructure on the Mississippi River is in desperate need of improvements. But some say before that investment is made, studies should be done to determine the effect it has on climate change.
New Orleans declares emergency over saltwater intrusion in drinking water
New Orleans mayor LaToya Cantrell signed an emergency declaration for the city last week amid concerns about saltwater from the the Gulf of Mexico that has been creeping up the drought-hit Mississippi River in Louisiana.
