評論
打印
Clearly, we have never understood what is causing desertification, which has destroyed many civilizations and now threatens us globally.
顯然，我們從未明白什么導致了荒漠化，這種荒漠化已經毀掉了很多的文明社會，而現在對我們的威脅是全球性的。
We have never understood it. Take one square meter of soil and make it bare like this is down here,
我們從來都沒有搞清楚過。像這樣一平方米的土壤表面像下面這樣程度的裸露著，
and I promise you, you will find it much colder at dawn and much hotter at midday than that same piece of ground if it's just covered with litter, plant litter.
我敢說，它會比被植被覆蓋的地方，同樣的大的地方，黎明的時候會冷得多，中午時會熱得多。
You have changed the microclimate.
你已經改變了這個地方的微氣候。
Now, by the time you are doing that and increasing greatly the percentage of bare ground on more than half the world's land, you are changing macroclimate.
現在，就像你剛才做的那樣，如果世界上裸露的土地的面積快速的增長到超過了世界土地一半以上的面積，大氣候就被我們改變了。
But we have just simply not understood why was it beginning to happen 10,000 years ago?
但是我們還是無法理解為什么這個過程一萬年前就開始了？
Why has it accelerated lately? We had no understanding of that.
又為什么最近加快了？我們對此無法理解。
What we had failed to understand was that these seasonal humidity environments of the world,
我們過去不了解的是，世界上這些季節性雨水充沛的環境中，
the soil and the vegetation developed with very large numbers of grazing animals,
伴隨著植被的蓬勃生長，
and that these grazing animals developed with ferocious pack-hunting predators.
數量可觀的游牧食草動物也隨之而來，而這些游牧的動物又引來了兇猛的獵食者。
Now, the main defense against pack-hunting predators is to get into herds,
游牧動物防御捕食者的主要方法是群居生活，
and the larger the herd, the safer the individuals.
獸群越大，個體就越安全。
Now, large herds dung and urinate all over their own food,
大量的獸群在自己的食物上大小便，
and they have to keep moving, and it was that movement that prevented the overgrazing of plants,
而它們又必須不斷的遷移，這些遷移過程防止了過渡放牧的現象，
while the periodic trampling ensured good cover of the soil, as we see where a herd has passed.
同時定期的踩踏土壤，正如這群動物路過時發生的那樣，確保了土壤表面得到了很好的覆蓋。
