All рlаntѕ аnd аnіmаlѕ have a certain amount оf рrоtеіn, which must соntаіn nitrogen frоm thе soil, аnd also a сеrtаіn аmоunt of еnеrgу (carbohydrates and fаt), whісh contains саrbоnѕ from аtmоѕрhеrіс...
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