As you can see, volcanic ash can be fatal to crops and other forms of life. Right now we have 36 active volcanoes and we really officially began the solar cycle 25 where the GSM begins to really settle in. If you have enough of these taking out local crops, think about what happens when one or two of these major volcanoes erupts.
We all know that the 1815 eruption at Tambora brought us a year with no summer and 3 years of additional cooling to the region. So, we are starting to see this with our own eyes and articles like this, are becoming more frequent. Here is an article from watchers.news explaining the image above: