A petawatt hour is a trillion kilowatt hours.

一peta瓦时等于1万亿千瓦时。

That's right, roughly 174 petawatts of energy hit the earth from the sun!

没错，地球会从太阳那里接收到大约174太瓦的能量！

But I had never heard of a petawatt hour until I wrote a book on climate change solutions.

但直到我写了一本关于如何应对气候变化的书，才对peta瓦时有所听闻。

But for a comfortable rate of carbon removal, we would need perhaps 120 petawatt hours per year total.

但想达到优裕的碳去除率，我们每年就需大约120peta瓦时的发电量。

Based on projections of global development by 2050, generation needed rises to 60 petawatt hours per year.

根据2050年全球发展的预测，我们每年需要的发电量增长至60peta瓦时。

That’s right, roughly 174 petawatts of energy hits the earth from the sun!

没错，大约有 174 拍瓦的能量从太阳射向地球！

Projections based on current policies around the world show that we are on track to have about 25 petawatt hours of clean electricity generation in 2050.

根据全球目前的电力供应政策，我们估计在2050年清洁能源的电力供应将达到25peta瓦时。

In our current energy world, electrifying 60 percent, which is ambitious, would add enough demand that we would need roughly 40 petawatt hours of total electricity generation by 2050.

在现今的能源世界里，实现 60% 的电气化是雄心勃勃的目标，这会增加人们的用电需求，以至到了2050年，大约需要40peta瓦时的总发电量。

This is a much rougher estimate, but to be confident of minimizing climate change impacts, we should aim to push our line up to around 90 petawatt hours per year.

这只是一个非常粗糙的预测，但若想确保能够极力缩小气候变化带来的冲击，我们就应致力于将每年的发电量提升至90peta瓦时左右。