On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland.
在某些地方,特别是在南美洲,稀树草原的形成似乎与频繁地砍伐和焚烧潮湿的森林作为牧场有关。
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Most notably, they found that very high doses of antioxidant polyphenols shut down and prevent cancerous tumors by cutting off the formation of new blood vessels needed for tumor growth.