On Tuesday 21 January 2020, there's a programme on BBC2 at 9pm called "Chris Packham: 7.7 Billion People and Counting".
The UN is predicting that the number of people on this planet could hit 10 BILLION people by 205.
Chris Packham has dedicated his life to championing the natural world. The topic of the growth of the human population and its impact on the planet is all too often overlooked.
Is 10 billion too many people for the earth to sustain? Why is the human population growing so fast? What impact is the human population growth having on the natural world? Can anything be done?
In Brazil, Chris finds a megacity about to run out of water - and an industry expanding to meet growing human numbers.
And he visits Nigeria, which is about to become the third most populated country on earth by 2020. He visits a community surviving against the odds - and a school which might hold the answer in a future fall in the birth rate.
And Chris Packham meets Sir David Attenborough who is also a patron of the charity Population Matters.
Chris also examines the role of falling birth rates around the world, the impact of an aging population, and meets a couple who are struggling to get pregnant through IVF.
And he turns to the impact our levels of conusmption are having. Can the world really accommodate the needs of over 2 billion more people?
How big is your footprint? Here's a number of footprint calculators you can try to start reducing your footprint