:::::See the excerpt from The Climate War which I added one section down. I would envision something along those lines - which would summarize Singer's work as a public-policy advocate over the past several decades on issues including ozone depletion, secondhand smoke, and climate change. That would seem a bit more encyclopedic and less recentist than the current focus, which seems to be entirely on climate change, and it would mirror the description used by reliable sources. ''''''