Python - manejar elementos de listas anidadas

A=['juan','pedro','maroi']

b=['si','no','si' ]

for i in A:

   for x in b:

    if x=='si':

      print(i,'hay actividad volcanica')

    else:

      print(i,'no hay actividad volcanica')

A=['juan','pedro','maroi']

b=['si','no','si' ]

for i in range(len(A)):

	print A[i],b[i]

for m, n in zip(A,b):

    print(m, n)