translation.en: But when climate became, politically, a hot topic -- if I may make the pun -- in the last 15 years, this became so un-PC, we couldn't talk about it.
translation.zh: 但是当气候成为政治上的热门话题——请允许我用这个双关语—— 在过去15年，气候问题变得不政治正确了，我们不能谈及这一问题。