Crop yields have trended upwards for years over the decades, but that's a poor indicator of the impact of CO2. However, it's probably a good indicator of the ingenuity of humans, so whatever happens, we're likely to adapt well to the changes, and I forsee improving standards of living for the world at least through the next hundred years.
The oceans rose about 8" along with temperature and CO2 during this timeframe, similar to what is projected for the next 100 years.
