be devastating to the planet we've already lost  20 percent and scientists warn that the rainforest  

我們已經失去了20%，科學家們警告說，熱帶雨林會對地球造成毀滅性的破壞。

is coming uncomfortably close to a tipping point  where an irreversible change in the climate system  

正在令人不安地接近一個臨界點，即氣候系統發生不可逆轉的變化。

could transform this luscious landscape into a  dry savanna-like ecosystem which would be huge  

可以將這一美麗的景觀轉變為類似熱帶草原的乾旱生態系統，這將是巨大的。

the amazon basin spans over 6 million square  kilometers and is home to one-fifth of the  

亞馬遜盆地的面積超過600萬平方公里，是五分之一的國家的所在地。

world's land species it also supports the 30  million people who live and depend on the land as  

世界上的陸地物種，它也支持著3000萬以土地為生的人，作為

a source of food medicine and shelter that's not  even including the key role it plays in regulating  

食物、藥品和住所的來源，這還不包括它在調節食物、藥品和住所方面所起的關鍵作用。

the regional and global climate trees absorb water  through their roots and transport it to their  

區域和全球氣候 樹木通過根部吸收水分並將其輸送到它們的根部。

leaves where it's released as water vapor through  small pores in a process called transpiration  

蒸騰作用

as the water vapor rises and condenses it forms  rain clouds over the forest canopy basically the  

當水蒸氣上升並凝結時，它在森林樹冠上形成雨雲，基本上是雨雲。

rainforest is making its own weather for example  one large tree can release 1 000 liters of water  

雨林正在製造自己的天氣，例如一棵大樹可以釋放1000升水

into the atmosphere in a single day the rainforest  recycles this water up to six times before it  

雨林在一天內將這些水循環利用了六次，然後才將其排放到大氣中。

moves out of the region but as more trees are cut  down those that remain may not be able to recycle  

但隨著越來越多的樹木被砍伐，剩下的樹木可能無法回收利用。

enough water to survive fewer trees means more  sunlight will hit the forest floor exposing the  

足夠的水來生存更少的樹木意味著更多的陽光會照射到林地上，使林地暴露在陽光下。

forest to higher temperatures since deforestation  began accelerating in the 1970s 800 000 square  

自20世紀70年代開始加速砍伐森林以來，森林的溫度升高了80萬平方公里。

kilometers of the amazon have been lost and over  that same period the average temperature of the  

在同一時期，亞馬遜地區的平均溫度下降了。

basin has risen by one degree celsius scientists  are concerned that if deforestation continues for  

科學家們擔心，如果繼續砍伐森林，盆地的溫度會上升1攝氏度。

another 10 to 15 years the eastern and southern  amazon will turn into a savannah not only would  

再過10到15年，東部和南部亞馬遜將變成一個大草原不僅會。

losing the rainforest mean a drastic change in  this weather system but remember the amazon is  

失去雨林意味著天氣系統的巨大變化 但請記住，亞馬遜是。

also a well-known and excellent carbon sink this  means that its trees suck carbon dioxide right out  

也是一個著名的優秀的碳匯這意味著它的樹木吸二氧化碳的權利。

of the air and store it in their biomass through  photosynthesis an estimated 136 to 181 billion  

並通過光合作用將其儲存在生物質中，估計有1360億至1810億的空氣。

metric tons of carbon are stored this way helping  to slow the rate of global warming but scientists  

公噸的碳以這種方式儲存起來，有助於減緩全球變暖的速度，但科學家們卻認為，這種方式是一種很好的選擇。

have found evidence that the amazon could flip  from being a carbon sink to a carbon source if  

有證據表明，亞馬遜可以從碳匯翻轉為碳源，如果

unchecked deforestation continues some estimates  show that this is already happening in one fifth  

一些估計表明，這種情況已經在五分之一的地區發生。

of the amazon and yet deforestation continues  between august 2018 and july 2019 tree loss  

但在2018年8月至2019年7月期間，森林砍伐仍在繼續，樹木損失嚴重。

has increased to more than ten thousand square  kilometers the largest rate in roughly a decade  

已增加到一萬多平方公里，是近十年來的最大速度。

with scaled-back environmental protections in  the region commercial operations like farming and  

在該地區，隨著環境保護的縮減，商業活動，如農業和商業活動，都會受到影響。

logging are expected to continue growing the rate  of deforestation at present fires are typically  

預計目前的森林砍伐率將繼續增長，目前的火災一般都是在森林中發生的。

set to clear the land for these practices in fact  an estimated 90 of the amazon fires in 2019 were  

設為這些做法清理土地事實上，2019年亞馬遜火災中估計有90。

intentionally set releasing roughly 392 million  metric tons of co2 into the air and in just the  

故意將約3.92億公噸的二氧化碳釋放到空氣中，而在短短的一年時間裡，就釋放了約3.9億公噸的二氧化碳。

first eight months of 2020 fires added around 226  million metric tons of carbon dioxide into the air  

2020年前8個月的火災使空氣中增加了約2.26億噸二氧化碳

the equivalent of nearly 50 million cars this is  where the scientists forecast comes in according  

相當於近5000萬輛汽車，這就是科學家們的預測。

to their study if deforestation reaches 20 to  25 percent of the amazon it will flip to a dry  

他們的研究，如果森林砍伐達到20％至25％的亞馬遜它將翻轉到一個乾燥的。

savanna the reality check is that we're almost  there current deforestation is at a frightening 17  

大草原的現實檢查是，我們幾乎沒有 目前的森林砍伐是在一個可怕的17

across the entire amazon basin and approaching  20 in the brazilian amazon so at this point  

在整個亞馬遜盆地，並在巴西亞馬遜接近20，所以在這一點上。

you're probably wondering we're at our limits and  what can even be done well don't lose hope last  

你可能想知道我們已經到了極限，還有什麼可以做得更好的，不要失去希望，最後一個

september a motivated group of scientists formed  the science panel for the amazon their plan is to  

九月，一群積極的科學家組成了亞馬遜科學小組，他們的計劃是

produce a scientific assessment by 2021 to propose  solutions to help secure the forest's future  

* 在2021年之前進行科學評估，提出有助於確保森林未來的解決方案。

there are also ambitious reforestation  projects in areas like abandoned cattle ranches  

還有一些雄心勃勃的重新造林項目，如廢棄的養牛場。

these reforested areas make up about 23  of destroyed forests and can absorb carbon  

這些重新造林的地區約佔被毀森林的23%，可以吸收碳。

11 times faster than the trees that once stood  there so there is a glimmer of hope and remember  

比曾經矗立在那裡的樹木快了11倍，所以有了一絲希望和記憶。

unlike the 2019 to 2020 forest fires in australia  and california that were fueled by climate change  

不像2019年到2020年澳洲和加州的森林大火是由氣候變化引發的。

more than 90 percent of fires in the amazon were  set by people which means that we actually have  

超過90％的火災 在亞馬遜是由人設置 這意味著，我們實際上有

the power to stop them by changing our behaviors  we can tip the scale in our favor and avoid the  

我們可以通過改變我們的行為來阻止他們，我們可以使天平向我們有利的方向傾斜，避免了

savannah-like conditions that scientists say are  quickly approaching but that's just a projection  

稀樹草原一樣的條件，科學家說很快就會到來，但這只是一個推測

it won't become a reality unless we let it the  climate crisis is here and we're here to cover  

除非我們讓它成為現實 否則它不會成為現實 氣候危機就在這裡，我們在這裡掩護它

it let us know what other stories you'd like to  learn more about down in the comments subscribe  

讓我們知道你想了解更多的其他故事，在評論中訂閱。

to seeker to stay informed and as always thank  you so much for watching i'll see you next time

看客保持資訊，一如既往地感謝你這麼多的觀看，我會看到你的下一次。