Developing nations to study ways to dim sunshine, slow warming

Scientists in developing nations plan to step up research into dimming sunshine to curb climate change, hoping to judge if a man-made chemical sunshade would be less risky than a harmful rise in global temperatures.


The existential trap of solar geoengineering

With so much at risk from climate change, scientists in developing nations understandably argue they must be at the table as these technologies are explored for their benefits and costs (see commentary in Nature). This story from Reuters explores an initiative, the Solar Radiation Management Governance Initiative (SRMGI.org) that is facilitating developing nation engagement in assessing solar geoengineering.

Let's hope their deliberations encompass the existential threat these technologies pose: One they are employed, they give excuses to avoid reducing carbon emissions. Yet once they are deployed, what happens if major societal disruptions bring them to a halt (for example, if financial collapse means there are no longer resources to pay for them)? The carbon emissions that were permitted to enter the atmosphere because of the promise of solar geoengineering will likely rapidly assert their impact on global temperatures. Any assessment of solar geoengineering must examine this endgame.

There are other obvious risks, most especially that solar geoengineering to lessen temperature increases does nothing to prevent further accumulation of carbon dioxide in the oceans and fresh water bodies, exacerbating acidification.

See the full story in Reuters.

www.newscientist.com

60 per cent of world’s rivers stop flowing for at least one day a year

The first detailed global map of river flow shows that more than half the world's rivers stop flowing for at least one day a year and many could run dry if climate change isn't addressed.

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www.eenews.net

'Most fundamental' climate metric takes a worrying turn

As humans have pumped greenhouse gases into the atmosphere, the Earth's energy balance has tilted. Greenhouse gases prevent extra energy from radiating back out to space, causing global temperatures to rise.

apnews.com

Doctors warn of burns from asphalt as heat wave hits US West

Doctors who work in Arizona and Nevada burn centers are warning of injuries from contact with super-heated roadways and other surfaces as the first extreme heat wave of the year extends across the U.S.

www.sierraclub.org

Can we save the San Joaquin's salmon?

As California's population grows, water shortages deepen, and the impacts of climate change intensify, the effort to restore a river and its fish is an expensive and resource-intensive gamble.

grist.org

Salad will survive climate change. But at what cost?

In order to maintain American's year-round demand for salad, more growers are looking into moving delicate crops like baby greens indoors.
www.wesa.fm

New ‘Toxic 10’ list outlines worst industrial polluters in Allegheny County

The 10 biggest industrial air polluters in Allegheny County released higher levels of toxic emissions in recent years.
www.post-gazette.com

PA: Impact fee payments shrink as natural gas price, drilling declined in 2020

Low natural gas prices and scant new drilling sent Pennsylvania's impact fee revenue from shale gas wells plummeting to the lowest level on record for the 2020 reporting year, according to Pennsylvania Public Utility Commission data released this week.