Kew Gardens has recently released it's first report on the current state of plant life across the globe. Take a look at this report if you are interested in putting food in your stomach or having medicines available to the sick. The product of over 80 scientist the report documents new plant discoveries, cleans up some aspects of nomenclature and offers progress on the medicinal values of several species.
The report also documents in a sober and unsentimental style the effect of climate change on the thousands of various plants that we depend upon to survive. Over 20% of the world's plant species are threatened in one form or another. Many are already past the point of no return. A fantastic read on the subject if you prefer data over drama.