If 5 degrees is a mass extinction event (I&#x27;m just using your numbers here, not positing them as facts of my own), how can you characterize 1-2 degrees (20-40% of your mass extinction event number) as a &quot;small&quot; issue?<p>As an &quot;engineer&quot; (note: software engineer, not a real engineer), I&#x27;d prefer to leave as much wiggle room as we can possibly muster on the spectrum of activities heading us towards &quot;mass extinction event&quot;.