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When they defined a tree as โa plant with woody stems larger than 10 cm diameter at breast height,โย Hintlerโs team calculated that the world holds about 3 trillion trees, roughly 10 times the previous estimate. Then, they compared this number to United Nations estimates of global forests 10,000 years ago, at the dawn of agriculture. They found that the number of trees had fallen by roughly half, from 6 trillion, and that humans cut down over 15 billion trees every year.
La ยซย timiditรฉย ยป est en botanique un phรฉnomรจne d'allรฉlopathie encore mal compris par lequel certains arbres (nombre minoritaire d'espรจces) maintiennent entre eux, voire entre leurs propres branches maรฎtresses, une certaine distance, appelรฉe ยซย fente de timiditรฉย ยป, typiquement entre 10 et 50 cm bien que ces limites soient peu dรฉfinies1.
Un phรฉnomรจne similaire existe pour certaines essences (pas les mรชmes) au niveau des racines