It seems the high school students mentioned in the previous post sent their 5 questions to other distinguished climate authorities, not least to Ross McKitrick and to Richard Lindzen. Both have made their replies public. Here is the one from McKitrick:
Five questions from students about climate change
Ross McKitrick
January 2018
'In late 2017 I was contacted by a group of students at a high school in Europe asking if I would
answer some questions on climate change for a project they were working on.
Here are the questions they asked, and the answers I gave them.
1.
What is behind global warming?
Over the last 150 years there have been influences due to strengthening solar output, land-use
changes, increased greenhouse gases and natural variability, among other things. The
dominant school of thought in climatology is that rising greenhouse gas levels explain most of the
overall warming trend since the 1950s. There are good reasons to support this, although the
climate system is too complex to assume the matter is settled. The mechanisms by which the sun
affects the climate are not well understood, nor are the mechanisms behind clouds, ocean-atmosphere
interactions and other basic processes. The relative lack of warming in the tropical
troposphere and over the South Pole are not easily explained under the theory that greenhouse gas
levels dominate the climate system.
2.
What can we do to prevent global warming?
If it is a natural process, nothing. If it is mainly due to rising greenhouse gas levels we need to ask
instead whether we would want to prevent it. It would require complete cessation of fossil fuel use,
which would cause intolerable economic and social costs and would only yield small changes in the
time path of global warming for the next century or more. Even large-scale emission reductions
(such as under the Paris and Kyoto treaties) would only cause a small slowdown in the
accumulation of CO2 in the atmosphere by 2100, so any benefits from such policies are likewise
tiny, yet the costs would be enormous. The small warming that took place since the early 20th
century was largely beneficial, and the astonishing social and economic benefits associated with
cheap fossil energy far outweighed any problems it might have created. It is likely that this will be
true over the next century as well.
3.
If we don't do anything about it, how does it affect us and our descendants?
Humans flourish in every climate on earth from the tropics to the polar regions. We are very
adaptable. The only issue is whether changes take place so quickly that we cannot adapt, but
history shows this to be a rare situation. Climate processes are slow, and if the climate models are
correct, the changes are gradual and predictable. People can adapt to warming conditions more
easily than to cooling conditions. The IPCC predicted that over the next hundred years, changes in
economies and technology will have a much larger effect on peoples' lives than changes in climate.
4.
What will happen in the future, and what are the alternatives for us, if the Earth becomes
unlivable?
There is no chance that greenhouse gases will make the Earth unlivable. If an asteroid hits, or
another ice age begins, or something like that, then we face catastrophe. But the question
essentially asks, what happens if we all die? The answer is, we all die.
5.
How can we save Earth if it isn't too late?
To ask the question is to reveal that you greatly overestimate your size in relation to the Earth. We
could not ruin the Earth even if we tried, nor could we save it if it faced ruin. Our planet is a
remarkably adaptable and robust home. We don't live in a giant china shop where everything is
fragile and breakable, it's more like a playground where everything is made to withstand
considerable wear and tear. Over the Earth's history the amount of CO2 in the air has typically been
2-10 times higher than at present yet the plants, animals and oceans flourished. Much of the past
half million years have been ice age conditions which wiped out life on the northern continents, yet
it always came back as soon as the ice retreated. If you take the view that the ordinary
human pursuit of prosperity and happiness will somehow destroy the planet you will end up
adopting an anti-human outlook. This is both a scientific and an ethical error. Set your sights on a
more modest scale, by trying to be a good citizen and be helpful to the people around you, and you
will make much better decisions than if you are thinking in terms of faraway abstract categories
like saving the Earth.
Good luck with your studies.'
Downloadable from here:
https://www.rossmckitrick.com/uploads/4/8/0/8/4808045/5questions.pdf
Unfortunately, the Lindzen reply is behind a paywall, here:
https://link.springer.com/article/10.1007/s12129-017-9669-x
Hat-tip for both to SEPP:
http://www.sepp.org/twtwfiles/2018/TWTW%201-6-18.pdf