January 7 - Max Yasgur, owner of the New York farm where the 1969Woodstock Festival was held, is sued for $35,000 in property damages by neighboring farmers
February 17 - Joni Mitchell announces that she is retiring from live performances, following her show at London's Royal Albert Hall. Mitchell would be back performing concerts within a year.
March - Jim Morrison of The Doors is found guilty of indecent exposure and profanity because of his behavior during a March 1, 1969 concert. Morrison is sentenced to eight months of hard labor and a $500 fine.
April 2 - The London Magistrate's Court hears arguments on John Lennon's indecency summons for his exhibition of erotic lithographs during his art exhibit on January 16
... employs a very complex mechanism for the adsorbption and conversion of light into chemical energy, using chemical pathways with many important intermediates. ...