Were that to be the case, this alternative hypothesis would cause our policy to be very different : in this case we should be taking active steps now to curb emissions and to participate in international treaties to curb it.

• 如果我们真的把它当作政策基础的话，那么这个假设将会使我们的政策与上文中提到的大不相同：我们现在就会采取积极的措施减少排放，并且加入关于减排的国际条约。