Given that a safe level for humans would be 350 parts per million (ppm), we're now easily in the danger zone.

A Life on Our Planet contains my witness statement, and my vision for the future - the story of how we came to make this, our greatest mistake, and how, if we act now, we can yet put it right. With his extraordinary charm and sense of wonder, bringing together science, philosophy and art, Carlo Rovelli unravels this mystery. So it seems really very unfair that Man should have chosen the gorilla to symbolise everything that is aggressive and violent, when that is the one thing that the gorilla is not - and that we are. Lots of depressing information is laid out as Sir Attenborough drops truth in this book, truth that the entire world desperately needs to listen to and begin to understand. We also learn of humanity's evolution, the different environmental circumstances which our ancestors had to survive and what has changed until now (this, the Holocene, is the gentlest era thus far).One cannot talk about saving the earth when they partake in the single biggest contributor to natural destruction, climate change, habitat loss and species extinction. Clark found that it "may not be entirely original but it is an important message from a messenger without parallel". It is not simply a food chain—which implies a linear flow of energy—but a dense fabric, spreading in many directions, with each node bound up with every other.

Why is it that our home is crying and instead of succumbing to our love for home, we are growing aloof from it? Tuna sweep around the baitfish, penning them against the surface, swimming around them to drive them into a tight ball. Sir David is a Trustee of the British Museum and the Royal Botanic Gardens, Kew; an Honorary Fellow of Clare College, Cambridge; a Fellow of the Royal Society and was knighted in 1985.He has also spent his life documenting natural life and presenting numerous examples of species extinction and environmental destruction.