O

obligation, 80

oil(s), 17, 23, 24, 30, 148, 172, 175, 183, 207, 220,

240 olives, 13, 14 omission, 274 open spaces, 135

optical properties, 172, 196, 198, 201, 207 optimization, 63, 85, 111 optimum allocation, 268

ores, 151

organic matter, 220 organism, 233

219, 221, 222, 227, 228, 229, 256, 261 orientation, 141, 147, 151, 172, 174, 188, 197, 198, 208 osmotic, 187 overload, 229

ownership, 216, 257, 258, 261, 263 oxygen, 26, 142, 225

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