yl on ▁described ▁this ▁work ▁as ▁" very ▁wet , ▁org asm ic ▁process ▁art ." ▁In ▁ 1 9 7 0 ▁and ▁ 1 9 7 2 , ▁A yl on ▁showed ▁at ▁the ▁Max ▁H utch inson ▁Gallery ▁in ▁So H o ; ▁in ▁ 1 9 7 5 ▁and ▁ 1 9 7 9 , ▁her ▁P aint ings ▁that ▁Change ▁in ▁Time ▁were ▁exhib ited ▁at ▁Betty ▁Par s ons ▁Gallery , ▁Susan ▁C ald well ▁Gallery , ▁M IT , ▁and ▁the ▁Oak land ▁Museum . ▁ ▁Anti - n uc lear ▁and ▁e co - activ ist ▁art ▁ ▁By ▁the ▁ 1 9 8 0 s , ▁A yl on , ▁was ▁a ▁self - des cribed ▁e co - f em in ist . ▁She ▁began ▁to ▁create ▁anti - n uc lear ▁and ▁e co - activ ist ▁art , ▁which ▁included ▁Earth ▁Am bul ance . ▁This ▁work ▁consisted ▁of ▁an ▁" amb ul ance " ▁( a ▁converted ▁U - Ha ul ▁van ) ▁that ▁symbol ized ▁an ▁attempt ▁to ▁save ▁the ▁world ▁from ▁nuclear ▁war . ▁Using ▁the ▁Earth ▁Am bul ance , ▁A yl on ▁gathered ▁d irt ▁from ▁Str ateg ic ▁Air ▁Command ▁nuclear ▁bases , ▁u ran ium ▁mines , ▁and ▁nuclear ▁react ors ▁from ▁across ▁the ▁United ▁States . ▁She ▁stuff ed ▁the ▁d irt ▁into ▁pill ow cases ▁and ▁used ▁them ▁in ▁a ▁demonstr ation ▁at ▁the ▁United ▁Nations ▁during ▁the ▁Second ▁Special ▁Session ▁on ▁N