It is quite physically impossible and also economically impossible for any one country or group of countries to undertake this.

That innocent-sounding idea would make it economically impossible to impose many, perhaps most, environmental restrictions for the benefit of future generations.

The cable car has run from 1963 to 2007, when a major fault in the engine room made repairs economically impossible.

I have a colleague who has demonstrated that it is economically impossible.

It was generally agreed that the costs of cutting emissions would be economically impossible for them.

Since then it has been generally accepted that interstellar warfare for economic or territorial gain is logistically and economically impossible.

Q. Your platform often demands things that seem politically or economically impossible.

In May 1797, he argued that it would be economically impossible to abolish slavery.

"We view this as short of actual decommissioning and doesn't make putting that plant on stream economically impossible."

Although they loved the region, he wrote later, it was physically and economically impossible for the Ogilvys to succeed.