Even the worst enviromental challenges can be tackled .

即便是最严峻的环境问题，也能得到解决。

That is what must be tackled .

这是必须予以解决的问题。

Does inequality really need to be tackled ?

不平等真得需要解决吗？

Some countries have successfully tackled it .

一些国家已经成功的解决了这种问题。

These grossly misaligned incentives must be tackled .

这些非常离谱的激励措施必须得到解决。