We release 55 gigatons of greenhouse gases into the air every year.

我們每年排放 55 億噸溫室氣體至大氣中。

To stop global warming, we have to get our greenhouse gas emissions down to zero.

為阻止全球暖化，我們必須將溫室氣體排放量降到零。

But for every country to immediately shut down all greenhouse gas-releasing activities would be an enormous challenge,

但要每個國家立即停止所有溫室氣體排放活動是項巨大的挑戰，

especially since some countries have built up an economic head start with no restrictions.

特別是有些國家早在沒有限制的情況下建立了領先的經濟基礎。

So instead, we can use an approach called net zero.

取而代之，我們可以用「淨零碳排」這個方法。

Net zero means that for every molecule of greenhouse gas we put into the air, we also take one out, making our net emissions zero.

所謂「淨零碳排」就是每排放一個溫室氣體分子到大氣中，就要減少一個，好讓淨排放值為零。

Net zero requires us to make big changes today, use less more efficiently, and even bigger technological changes for the future,

要達成淨零，我們必須做出重大改變：消耗更少資源、增加效率，並於未來使用更高超的技術，

like replacing all greenhouse gas-emitting activities with clean ones.

像是用無碳排放的技術取代所有會造成溫室氣體排放的活動。

We'll also have to capture greenhouse gases from the air and store them permanently.

我們也必須匯集大氣中的溫室氣體，將它們永久貯存。

And yet, net zero is our best chance for a sustainable future.

「淨零碳排」是人類永續未來的最大希望。

Take action on climate change at Countdown.ted.com

【採取行動因應氣候變遷，請到 Countdown.ted.com】