Answer:
washboard, De Geer, push, ice-thrusted
The ice caps are melting due to global warming which is being affected by the polluted air
Description The Fermi paradox, named after Italian-American physicist Enrico Fermi, is the apparent contradiction between the lack of evidence for extraterrestrial civilizations and various high estimates for their probability. Michael H. Hart formalized the basic points of the argument in a 1975 paper.
