As human population grows there is increasing conflict between people and nature. Competition for space and resources is intense in many areas and increasingly some species are regarded as pests when they raid crops, damage forestry or compete with us for game. Identified as one of the greatest challenges for conservation in the 21st Century, solutions are actively being sought. Whether it is living with big cats, birds of prey or reptiles, solutions will require conservationists to sit down with those who want to eradicate unwanted wildlife and be willing to accept compromise. Monty Don explores where the hotspots are, what is happening to broker solutions and what the future looks like in an increasingly crowded world.