On Thu, May 14, 2015 at 3:07 AM, LizR <[email protected]> wrote:

> On 13 May 2015 at 21:30, Telmo Menezes <[email protected]> wrote:
>
>>
>>> Clouds, especially high clouds have some effect.  They reflect visible
>>> bands back to space and they also absorb and reemit IR.  Low clouds tend to
>>> increase heat load because they reflect in the day, but they insulate day
>>> and night.  It's not magic, it's just calculation.
>>>
>>
>> Of course, I am not suggesting it's anything else.
>> My question is about complex interactions between these several
>> phenomena. Does a change in the composition of the atmosphere affect cloud
>> formation? In what ways? Does temperature?
>>
>> Is the idea that we shouldn't do anything because we haven't got a
> perfect model of the atmosphere?
>

Is it unreasonable to ask for evidence and serious risk analysis before
messing with the energy supply chain that keeps 7 billion people alive?


> I assume that isn't the point - after all, if we followed that logic we'd
> still be living in caves.
>

If progress depended on planet-wide collective action and consensus, we
would surely still be living in caves. We are not living in caves because
people look for realistic solutions to the problems they are faced with.
There is no planetary "we", and I think that's a good thing. In some
dystopian scenarios, survival may not be worth it.


> But then what is the point?
>

The point is to do risk analysis and treat the problem as a trade-off,
because cutting CO2 emissions is far from not having potentially
catastrophic consequences too.

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