Effect of climate change on the United States

"Climate changes in the US are underway in the United States and are expected to grow," says a key finding of a report on the effect of global climate change on this country. Higher levels of warming often negatively affect growth and yields, it continues, as do increased pests, water stress, diseases and weather extremes. Crop and livestock production will be affected.

I'm sitting at a talk given by the lead author of that report and the graphs and data are alarming.