In his lengthy career, Sir David has watched the human population more than double from 2.5 billion in 1950 to nearly seven billion. He reflects on the profound effects of this rapid growth, both on humans and the environment. While much of the projected growth in human population is likely to come from the developing world, it is the lifestyle enjoyed by many in the West that has the most impact on the planet. Some experts claim that in the UK consumers use as much as two and a half times their fair share of Earth's resources. Sir David examines whether it is the duty of individuals to commit not only to smaller families, but to change the way they live for the sake of humanity and planet Earth.

Episode Viewers and Ratings

Season 48 Episode 7 of Horizon resulted in a 0.00 rating in the 18-49 demographic.

Horizon Season 48 Episodes...

• s48e01 - Do I Drink too Much?
• s48e02 - The Secret You
• s48e03 - Fix Me
• s48e04 - Who's Afraid of a Big Black Hole?
• s48e05 - Why Do We Talk?
• s48e06 - How Long is a Piece of String?
• s48e07 - How Many People Can Live on Planet Earth?
• s48e08 - The Secret Life of the Dog
• s48e09 - Why Do Viruses Kill?
• s48e10 - Pill Poppers
• s48e11 - Don't Grow Old
• s48e12 - To Infiity and Beyond
• s48e13 - What Makes a Genius?
• s48e14 - Did Cooking Make Us Human?
• s48e15 - Is Everything We Know About The Universe Wrong?

Horizon Show Summary

Horizon is BBC Two's flagship 50-minute science documentary series.

Recognised as the world leader in its field, it regularly wins a sweep of international science, medical and environmental film accolades, and has recently won the Royal Television Society Award and the Prix Italia.

In 2002, the British Academy of Film & Television Arts presented Horizon with the BAFTA Television Award for Best Factual Series or Strand.

In 2003 it won the prestigious Images et Science award for best medical documentary and the Carl von Linne Award at the Living Europe film festival in Sweden. That year, a Horizon co-production with WGBH Boston won the Emmy for best documentary.

In September 2014 it celebrated its 50th anniversary and it continues to enjoy outstanding critical acclaim.