Two page spreads each show, on the left, a future advertisement, flyer, or another graphic illustrating a possibility if animals disappear, with an explanation on the right Flyer asking "Do YOU have green fingers? Can you rub flowers together?" accompanied by explanation about insects' importance to pollination Notification about blood pressure medicine running out accompanied by explanation about animal products being used to make medicine (like venom in blood pressure meds) Ad for "Bricky" - a pet brick - accompanied by explanation about love and help we get from pets Ends with a call to help charities save animals Glossary and index A World Without series also includes Plants, The Rain, The Sun.