within an environment that has had a steady CO2 atmospheric concentration of between 180 and 300 ppm (for the last 800,000 yrs)...Ice Ages...and Warm Periods...yet in just ~150 years that concentration has risen to 428 ppm, and is accelerating rapidly. Think of all the cities near coast lines, and factor in what would happen if our polar ice caps and glaciers melted (fyi...oceans would rise 230 ft.). While that's not too likely anytime soon, just think what a 10 ft. rise would do to those enclaves...and all the areas further inland. Think that might be problematic for future generations of human beings?...and we're not even talking about the impact of temperature increases on established farming regions...or fishing regions...which are already being impacted...and the increase in frequency and severity of hurricanes and drenching storms such as in Texas and the Carolinas.
THINK more broadly and deeper, Cheeks