sagan
ehrlich
climatic
summarizes
atmospheric
31
principal
link
dialogue
conclusions
devastation
carl
moscow
1983
papers
atmosphere
winter
drew
october
conference
200
november
biological
available
worldwide
phenomenon
believed
included
text
finding
held
lasting
paul
involved
implications
technical
term
providing
possible
dark
consequences
scientists
washington
profound
earth
presents
soviet
information
books
record
central
scientific
cold
nations
evidence
nuclear
best
long
war
american
world