Indoor plants connect us to the natural world. They remind us of our role as caretakers and return us to the garden where we are made more alive among the abundance and cycles of growth and transformation that are plants. At the same time the presence of plants calms and comforts us. Psychologists use the term ‘bio-philia’ to describe this sense of well-being and attraction to the natural world. We are also able to quantify the ability of indoor plants to remove harmful chemicals from the air, provide oxygen and humidify dry environments through the transpiration of water.