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Nuclear generation takes over a decade to deploy per plant. Solar and wind can be up and running in months. We have no time for nuclear.

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Solar is expanding nicely on its own. Nuclear is expanding, but too slowly. The reason it takes so long to build is because of bureaucratic regulation due to historical opposition.

Now, if we're serious about ending climate change, why not agree to setting a global target temperature?

Because its a fuzzy target. Much better to target a reduction of carbon emissions to zero. That can be measured.

Here's one existing measure of temperature:

http://climate.nasa.gov/vital-signs/global-temperature/

Two decimal places looks pretty sharp to me!

Yes they are, because throughout most of history, variations were very low, as you can see there, because, you know: It's a graph!

If you notice, the graph is not distorted, it's linear. 1 Celsius degree changes our climate in a mix of predictable and unpredictable ways that you don't want for our planet.

Plus: there's the added problem that the changes can be exponential after a while, melted Ice melts other ice more easily, permafrost defreezing releases methane that is worse than CO2 to the atmosphere, Ice changing color, etc.

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