Farmer weed crop International Institute of Tropical Agriculture/Flickr

Как безопасные вещества становятся опасными

ПАЛО-АЛЬТО – Со времен зарождения науки токсикологии в XVI веке её ключевой принцип был таков: «всё – яд, всё – лекарство; то и другое определяет доза». Это правило применяется к лекарствам, которые пациенты по всему миру принимают миллиарды раз в день. Правильная доза аспирина может стать терапевтическим спасением, но если съесть его слишком много, можно умереть. Этот принцип применим даже к еде: общеизвестно, что большое количество мускатного ореха или лакрицы – токсично.

Опасность того или иного вещества зависит от двух факторов: его собственных свойств, способных навредить, и подверженности человека их воздействию. Это очень простая мысль, но даже некоторые так называемые профессионалы, похоже, не могут ее понять. Это следует из решения Международного агентства по изучению рака (МАИР), входящего в состав Всемирной организации здравоохранения, которое классифицировало повсеместно используемый гербицид 2,4-Д как вещество, «способное вызвать раковые заболевания у человека».

Когда речь заходит о гербицидах, МАИР, похоже, теряет голову. Недавно эта организация причислила глифосат (еще один популярный гербицид) к числу «вероятно» канцерогенных веществ. Данный вывод противоречит мнению надзорных органов многих стран мира.

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