Here is a more recent and abridged version of that presentation with most of the time dedicated to Q&A:

https://youtu.be/dZIfF0vwDTw

David Keith is an extremely cautious scientist, but around 31:00 he says the critics have studied effects [of SO4 strato] on ecosystems, food systems, air pollution and the effects are "pretty small".

@tom_andraszek

who could have guessed #chemtrails could rescue us.

thanks for posting!

#solargeoengineering

(p.s., what we really need is a very cheap power breakthrough -- read #fusion, as all of the energy generation models that underlie these projections are based on current tech)