It could become a major problem because less solar output could result in global cooling.
Tell me folks, considering that trend, do you think that blue line is likely to go up? Or Down?
What would you put you money on?
Considering that it has plateued for far longer than in previous periods, don't you think that there may be something going on? Not only that, but we have added 40% more CO2, and over 150% more CH4 in about 160 years. Both the atmosphere and the ocean have measureable increases in temperature.
From just anthropogenic emissions, before this century is out, the amount of CO2 in the atmosphere will double. Given the release of CH4 from the Arctic Ocean clathrates, and CO2 and CH4 from the permafrost, it will likely be far more than that.