in 2014 they said:

Geoengineering could have 'catastrophic consequences': Schemes to control climate change could backfire, warn scientists
Geoengineering is the deliberate manipulation of environmental processes
Techniques include reflecting sunlight from space, adding lime to the oceans, and irrigating vast expanses of the deserts to grow trees
Report said geoengineering would be unable to prevent average surface temperatures from rising more than 2C (3.6F) by 2100
By Ellie Zolfagharifard
Published: 18:37, 26 February 2014 | Updated: 21:12, 26 February 2014
Schemes to deliberately manipulate the Earth’s climate could prove useless, and at worst harmful, claims a new study.
The strategies include reflecting sunlight from space, adding lime to the oceans, and irrigating vast expanses of the North African and Australian deserts to grow trees.
Known as geoengineering, ideas such as these have gained popularity with some governments attempting to meet their carbon emission targets while still producing cheap energy.
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But now they're saying:

Controversial plan to artificially cool the planet by firing aerosols into the atmosphere might NOT be as risky as thought, experts claim

Some scientists have proposed using aerosols to reflect radiation and cool Earth
But, a study earlier this year claimed it could backfire by making warming worse
If the technique were abruptly stopped, it would cause warming at faster rate
Scientists now say that this worst-case scenario, while scary, is not very likely
By Cheyenne Macdonald For
Published: 22:07, 12 March 2018 | Updated: 22:15, 12 March 2018

As the world grapples with different strategies to mitigate the warming climate, few have sparked such controversy in recent times as solar geoengineering.
The proposed plan would use aerosols, fired into the stratosphere with high-flying aircraft, to cool the planet by blocking radiation from the sun.
It would essentially mimic the effects seen after volcanic eruptions – but, an analysis published at the beginning of this year warned that the approach could have grave consequences.
If the plan to artificially cool Earth were abruptly stopped, the experts warned it could trigger extreme warming at rates far more dramatic than the current climate is changing, in a phenomenon known as the ‘termination shock.’
But now, some scientists have hit back, arguing that the risk might not be as it seems.
In a new paper published to the journal Earth’s Future, a pair of researchers from the Institute for Advanced Sustainability Studies in Potsdam, Germany and the John A Paulson School of Engineering and Applied Sciences at Harvard University explain that the current analyses focus on the worst-case scenario.
And, while termination shock would be catastrophic, it could mostly be avoided by taking a few simple precautions.
‘Most studies so far have focused on the extremes, like in a large-scale deployment that’s ended instantly and permanently,’ explains co-author Peter Irvine, of Harvard’s engineering school, in a video about the work.
‘If solar geoengineering were deployed at small scales, say cooling only a few tenths of a degree Celsius, then if it were ended there wouldn’t be substantial warming.
‘If it were phased out over the course of decades, there would not be a rapid warming, so that would also not constitute a termination shock.
‘And if it were turned off for some reason and then turned back on again, the termination shock could be avoided.’
Aerosols will remain in the stratosphere for months after their deployment has ended, giving a large window of time to restart the process before the shock takes hold, the researcher notes.
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and yet:

The ominous rise of Alzheimer's in America: 5.7 million people have it - and it's costing the US $277 BILLION a year
Alzheimer's is on a steep rise in the US, according to the Alzheimer's Association's annual report
Every 65 seconds, another person is diagnosed with the degenerative disease
As the baby boomer generation ages, 14 million people are predicted to have Alzheimer's by 2050
Early detection of the disease could save the US as $7.9 trillion
By Natalie Rahhal For
Published: 15:25, 21 March 2018 | Updated: 19:13, 21 March 2018
Alzheimer's disease is now debilitating 5.7 million Americans, according to the latest figures.
As death rates for most deadly diseases fall in the US, Alzheimer's deaths increased by 123 percent between 200 and 2015, and the trend is set to continue.
The degenerative brain disease costs the US thousands of lives and $277 billion each year, according to the Alzheimer's Association's annual report released Tuesday.
For most people, Alzheimer's disease will not be diagnosed for 20 years after the brain changes that cause it begin, and the association urges that detecting it in its early stages could save lives and as much as $7.9 trillion in the US.
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