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Re: The Climate, Environment and Energy Thread

Reply #166
https://theconversation.com/humans-are-driving-animals-and-plants-to-the-edge-but-are-we-really-heading-into-a-mass-extinction-168839
The author makes some interesting points.

I heard a podcast recently that covered the loss of primary species, critical species that possibility come out of the author's 1% or 2%  whatever it may really be, and the potential effects on secondary species that can trigger a cascade. That concept put more emphasis on the loss of diversity in specific habitats, rather than simply counting disappearing species which can be a natural event.

I worry greatly about the apparent loss of insects, many of the oldies among us just know without the need for further evidence that things have change dramatically around our cities just since we were kids. Our gardens and home use to be full of bugs of all types, many as common as muck which are now rarely seen. Where are the grasshoppers, caterpillars, plagues of moths around each and every light? I can turn a outside light on at home now and might not see a bug attracted to it in an hour.

FWIW, I try to contribute by logging sightings of marine life using https://www.redmap.org.au, which logs the change in the appearance or distribution of marine life driven from changing water temperatures. I believe there are equivalent websites for birds, native animals, plants and insects.
The Force Awakens!



Re: The Climate, Environment and Energy Thread

Reply #169
While acknowledging climate change is real, I'm not going to discount the historical truth that humans on both sides of this debate contribute equally to the bushfire issues through ridiculous land management politics, and the situation is getting worse not better!

In one regional district, I recently came across a news article reporting efforts by a councillor to move a ban on the planting of gum trees, because they are dangerous in bush fires and storms!
The Force Awakens!

Re: The Climate, Environment and Energy Thread

Reply #170
While acknowledging climate change is real, I'm not going to discount the historical truth that humans on both sides of this debate contribute equally to the bushfire issues through ridiculous land management politics, and the situation is getting worse not better!

In one regional district I recently came across a news article reporting efforts by a councillor to move a ban the planting of gum trees, because they are dangerous in bush fires and storms!
Bit like wind farms, you need acres of land, trees/bush cleared, native animals gone and then you have to dig up the ground to make your turbines, transformers and substations. Your green power isnt so green when you break it all down to the basic requirements.

Re: The Climate, Environment and Energy Thread

Reply #171
While acknowledging climate change is real, I'm not going to discount the historical truth that humans on both sides of this debate contribute equally to the bushfire issues through ridiculous land management politics, and the situation is getting worse not better!

In one regional district, I recently came across a news article reporting efforts by a councillor to move a ban on the planting of gum trees, because they are dangerous in bush fires and storms!

Why do fires burn intensely?

One simple answer (in terms of what man can control).

Fuel load.

Byrams's Fire Intensity Equation - simple, clear, precise.

The unequivocal standard for nearly 70 years.

I = Hwr

I = intensity (kW/m)

H = heat yield of fuel (J/g)
w= fuel consumed (kg/m2)
r = spread (m/sec)

Finals, then 4 in a row!

Re: The Climate, Environment and Energy Thread

Reply #172
One simple answer (in terms of what man can control).

Fuel load.
Simple algorithmic solutions are bent and twisted by lawyers and politicians on both sides of the argument who change the definition of the terms.

The term "Fuel Load" is a typical example, what is defined as a "Fuel Load" really makes a huge difference in the legislation and even effects the results of scientific studies that have to comply to definitions to receive funding.

Such terms are distorted by both Green Energy and Fossil Fuel advocates, for every Bob Brown there is a Craig Kelly battling each other to define the rules of the game.
The Force Awakens!

Re: The Climate, Environment and Energy Thread

Reply #173
I see reports of fusion energy being the silver bullet for future needs are starting to appear again,  with several countries making big investments. This has been discussed ever since I  can remember, a looong time.
Reality always wins in the end.

Re: The Climate, Environment and Energy Thread

Reply #174
I see reports of fusion energy being the silver bullet for future needs are starting to appear again,  with several countries making big investments. This has been discussed ever since I  can remember, a looong time.
ITER is the frontline effort and it is based in France.

I measure the quality of those fusion predictions against the knowledge that France is committed to building a fleet of next generation nuclear fission reactors. Surely if the fusion solution was genuinely close France wouldn't be doing that! :o

btw., Australia chose not to be involved in ITER, apparently all nuclear fission or fusion is bad for Australia, excluding so long as we can keep selling our uranium to France and China nuclear is NIMBY and therefore uranium sales are all good! ;) A pretty pissweak effort by our politicians and bureaucrats all around, and lacking foresight.

If fusion comes good solar, wind, tidal, geothermal are all dead in the water, none of them can provided 24x7 base load. Fission will also be dead in the water overnight. Hydrogen will also be massively impacted and it will signal the end for fossil fuels. So not being part of fusion research is pretty short-sighted.

I'm not surprised we are not involved in ITER or KSTAR. I remember driving past protestors to get into the Synchrotron in Clayton when it was being built, apparently when they switched it on a black hole would form over Monash Uni and we were all going to disappear up our own sphincters! Some of those protestors back then are probably politicians and bureaucrats now!
The Force Awakens!

 

Re: The Climate, Environment and Energy Thread

Reply #175
It looks like the USA has given the go ahead for Bill Gates energy group to build it's demonstrator Natrium reactor.

It's based on a long standing design using molten sodium that has been used in nuclear subs for decades, and is also a technology that is used in solar thermal. Sodium melts at relatively low temperatures, ~ 100°C.

It will also be the same fundamental technology the French use for small modular reactors Macron announced.

https://natriumpower.com

https://nuclear.gepower.com/build-a-plant/products/nuclear-power-plants-overview/prism1

Do you still think it's coincidence we've now bought into nuclear subs?

I see this as the fastest way to net zero, and far more sustainable than the renewables sector which seems to ignore the limited availability of rare resources in it's solution.

I suspect the step beyond this will be pebble bed reactors, bridging the gap that ultimately ends in fusion.
The Force Awakens!