Synopsis: The world will actually benefit from having more CO2 and being warmer because plants enjoy that environmental combination.
Source here. "As the air’s CO2 content continues to rise, plants will likely exhibit enhanced rates of photosynthesis and biomass production that will not be diminished by any global warming that might occur concurrently. In fact, if the ambient air temperature rises, the growth-promoting effects of atmospheric CO2 enrichment will likely also rise, becoming more and more robust."