Now we can hardly envisage a world without wireless.

Tony Seba says he can envisage a world where self-driving cars circulate a city continuously, collecting passengers whenever needed.

I can easily envisage a world in 2050 in which fossil fuels have declined in importance relative to other forms of energy.

The UN Security Council, at a summit chaired by US President Barack Obama, unanimously approved a resolution today that envisaged a world without nuclear weapons.