The 2050's

World population is predicted to reach 9.3 billion people, according to United Nations Population Division.

French demographist Emmanuel Todd predicts worldwide zero population growth birth rates by 2050.

The United Kingdom could have the largest population in Europe by 2050 and be the third biggest recipient of migrants in the world, UN projections suggest.

China, United States, India, Brazil and Mexico will be the largest economies in the world, according to a Goldman Sachs study.

Expected completion of a space elevator by 2050.

Predictions have been made for commercial hypersonic air travel by 2050.

Denmark's energy supply is planned to be supplied only by renewable energies in 2050.