Carl Sagan testifying before Congress in 1985 on climate change

35 years on and these 15 minutes or so of what Carl Sagan had to say are more relevant than ever.

And his closing statement, worringly, feels more out of reach than ever:

I think that what is essential for this problem is a global consciousness. A view that transcends our exclusive identifications with the generational and political groupings into which by accident we have been born. The solution to these problems requires a perspective that embraces the planet and the future because we are all in this greenhouse together.