Showing posts with label #. Show all posts
Showing posts with label #. Show all posts

Saturday, 15 August 2020

Why COVID deniers and climate skeptics paint scientists as alarmist (excerpt): Grist


people trying to obstruct action deny the severity of the predicament
Climate Change Denial Tactics
In an interview with Fox News last month, President Donald Trump called Anthony Fauci, the country’s top infectious disease expert, an “alarmist,” using a pejorative straight from the playbook of those who deny the science behind climate change. Fauci rejected the characterization, describing himself as a “realist.”

For anyone paying attention to arguments about climate change over recent decades, Trump’s comment sounded awfully familiar: Scientists are alarmists, everything’s a hoax, and hysteria abounds.

 Michael Mann, a climatologist at Penn State University, wrote an op-ed for Newsweek this week drawing parallels between his experience and Fauci’s during COVID-19. Science deniers have lobbied attacks on the two public figures, he explained, sending death threats, calling them names, and questioning their expertise.
So what do terms like alarmist and hysteria really mean, where did they come from, and how can people respond to such accusations?"

"The strategies used to dismiss the threats of climate change and coronavirus follow a similar pattern, and they’re employed by many of the same people. It starts with denying the problem exists, as Naomi Oreskes, a professor of history at Harvard who studies disinformation, has explained. Then, people trying to obstruct action deny the severity of the predicament, say it’s too hard or too expensive to fix, and complain that their freedom is under threat. Denying the science requires dismissing what scientists are saying, and the easiest way to do that is by questioning their motives, impartiality, and rationality.

“If we don’t trust scientists or medical experts because we see them as alarmist or hysterical or as contributing overreaction, then we don’t trust the info they’re giving us,” said Emma Frances Bloomfield, an assistant professor of communication at the University of Nevada, Las Vegas."

Read the complete Grist article by Kate Yoder

See also:

'Two global health emergencies': doctors group backs green stimulus: The Age


climate deniers, Trump, COVID-19, #cambio-climatico, #climatecrisis, #climatecriminals, #corporations, #criminales-climáticos-de-la-cárcel, #


Sunday, 19 July 2020

HYDROGEN The once and future fuel? Opinion



"London, 19 June: Desperate policy makers trying to reach Net Zero targets that are unaffordable and infeasible are rushing into the premature adoption of hydrogen as a last ditch attempt to save the current agenda.

Hydrogen gas may contribute to greenhouse gases
Hydrogen Gas



Dr John Constable, author of the study, said: 

“Hydrogen has genuine long term potential as a universal energy carrier to supplement electricity, but current methods of production are hugely expensive and will stress fresh water supplies. Target-driven haste is already resulting in accidents. Counterproductive and naive policies are compromising the hydrogen future.” "

"Faced with the task of eliminating carbon dioxide emissions while sustaining economic growth, the UK government, like others around the world, is promoting hydrogen as an energy carrier for sectors of the economy such as heavy transport and peak winter heating that are extremely difficult to decarbonize.

The wisdom of this policy, with a special focus on the United Kingdom, is addressed in a new historical and technical study published today by the GWPF.

The study concludes that current enthusiasm is a desperate measure that will jeopardise the long-term promise of hydrogen for the sake of short-term political optics.

Because of the accelerated timetable required by arbitrary targets, it is necessary to manufacture hydrogen via two expensive and energetically inefficient commodity production processes, the electrolysis of water, and the reforming of natural gas.

Electrolysis is extremely expensive, and the reforming of methane emits carbon dioxide and so requires Carbon Capture and Sequestration, which is not only costly but unproven at the required scale. Both these commodity processes imply high levels of fresh water consumption.

The prudent approach, obvious since the 1970s and still the official long-range policy of the government of Japan, is to aim for hydrogen production by the thermal decomposition of sea water employing advanced nuclear reactors, which alone might conceivably make hydrogen cheap. This is, however, very difficult chemical and nuclear engineering, and its realisation lies well into the future."


Hydrogen Gas
Part of an SMR plant
The paper also notes that hasty introduction will not give enough time for safe societal adjustment to the inherent dangers of a fugitive and readily ignited gas that has a strong tendency to technical detonation (combustion with a supersonic combustion frontier). The learning experience could be needlessly painful and deadly.



Ref Climate Change Institute comment on Hydrogen: The Once And Future Fuel (pdf)


Related:

'Terrifying': Scientists dig deep for missing piece of climate puzzle: SMH

 #cambio-climatico