Bummer: Business as usual allegedly means that CO2 will kill off 40 per cent to 70 per cent of all species within a lifetime

The Tyee – Tyee's Climate Change Crash Course: Part 5

The area experiencing at least severe drought would quadruple from 10 per cent presently to 40 per cent, while the area under "extreme" drought (the worst rating) would balloon from just three per cent presently to a terrifying 30 per cent.
...Biologists estimate that, on our present track of releasing CO2 from fossil fuels, between 40 per cent and 70 per cent of all species will disappear within a lifetime.

AR4 SYR Synthesis Report - 3.4 Risk of abrupt or irreversible changes

As global average temperature increase exceeds about 3.5°C, model projections suggest significant extinctions (40 to 70% of species assessed) around the globe.