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Aidan:"You need to understand cost benefit analysis is heavily dependent on assumptions. Assumptions about costs, assumptions about usage, assumptions about the value of the benefits, and assumptions about the discount rate."

You overlook the fact that there is no empirical scientific evidence to substantiate the hypothesis that anthropogenic CO2 causes dangerous global warming. You should be aware that AGW is being peddled on computer modelling that is invalid, in fact downright misleading and deceptive -- modelling that erroneously assumes CO2 as a major determinant of climate change, when in fact there are hundreds of factors that affect climate.

Consequently, in the absence of scientific justification, there is no economic justification for taking so-called action on climate change, that is a natural process

JBowyer,
Of course you're fed up with being told things that contradict your delusions. But the truth remains: solar and wind are cheaper than coal.

You claim that that "If they were then our power prices would not keep going up" is based on the false assumption that the rising price of electricity is due to the rising cost of generating it.

In reality, electricity price rises are the result of getting electricity prices residing a more profitable strategy for the electricity companies than generating more electricity is. Meanwhile coal power is unreliable; the recent Victorian blackouts were the result of two of their coal fired power stations being offline at a time of record demand.

Try looking at what the Greens actually want before making accusations about them.

From what evidence do you derive the conclusion that we're "clearly" absorbing rather than emitting CO2? And that claiming otherwise is a lie? All the evidence I've seen so far shows Australia to be a net CO2 emitter.

Nuclear power is one solution, but (as they've found in England) it's not the cheap option that many of its advocates seem to think it is.
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Raycom,
A claim that contradicts all the evidence is a lie, not a fact.

There is ample evidence that temperatures have risen even though incoming solar radiation has not.

Aidan, it appears that you have your facts mixed.

Have a read of the following OLO article:

Mathematical modelling illusions
By Jay Lehr and Tom Harris – posted Onlineopinion Friday, 11 January 2019

http://www.onlineopinion.com.au/view.asp?article=20114

Two challenges.
Offer a tender to supply four large brown coal plants in Victoria supplying electricity which will be paid for, what cost to the consumer? No current providers allowed to bid. That would start prices going down and when they were built our power bills will halve and no need for billions of solar and wind subsidy money. The Japs, Indians, Chinese and Germans would be in like Flynn.
Second challenge I am happy to buy waterfront properties for ten bucks a pop as they are all going underwater that is a bargain. Tell me Professor Flannery will sell me his two Hunter river waterfront properties?

JBowyer

'I am happy to buy waterfront properties for ten bucks a pop as they are all going underwater that is a bargain. '

to late. In 1989 the warmist were predicting nations going under by 2000. They are shameless.