This is president Barack Obama.

我是總統歐巴馬

NASA's Aura Satellite has been tracking global pollution trends for the past decade

過去十年來美國太空總署的 Aura 人造衛星持續追蹤全球的汙染趨勢

and it's initial findings have shown us a lot about the state of our atmosphere

人造衛星初步的發現已提供我們許多關於大氣層狀態的資訊

The satellite detects gases like nitrogen dioxide,

人造衛星可以偵測氣體，如二氧化氮

the common pollutant from cars and power plants,

最常見的汙染源來自汽車和發電廠

the data shows us that the United States and Europe have some of the highest emissional levels in the world

資料顯示美國和歐洲的排放量在世界上名列前茅

But it also shows us that over the last 25 years,

但同時資料中也顯示過去 25 年來

Nitrogen Dioxide levels have dropped by up to 50% in both regions.

二氧化氮的排放量在這兩個區域都下降了近 50%

Thanks in large part, to new rules that protect our air.

這都要歸功於大多數的人遵守新公約，保護了我們的空氣

At the same time, in China, India, and the Middle East.

然而在中國、印度和中東地區

This pollution has grown dramatically

汙染的狀況急遽惡化

So imagery like this can help us see what actions are working,

這個概念可以幫助我們了解該採取甚麼行動

and where we need to focus additional international efforts.

以及該加強國際上哪些地區的汙染防制措施

and it proves, that we all need to work together

我們必須一同攜手合作

to protect the one planet we've got.

來保護我們共有的唯一地球

Guys, thanks for watching DNews!

哈囉！ 感謝大家觀賞 DNews

Please take a second, and subscribe.

請先別離開，訂閱我們的頻道

and also watch President Obama on, "Science Presents: DNews"

並在本周每晚 9/8 起在「科學頻道」的

every night this week at 9/8 Central on "Science Channel"

「科學觀點呈現： DNews」觀賞歐巴馬總統的演說

Or you can watch them right here, on our youtube page.

或者您也可以在 Youtube 觀賞這些影片