How can we replace a range of conventional chemicals used for residential and domestic purposes with eco-friendly and health-friendly alternatives?

A brief look around any home today will reveal dozens of different chemical-based products - for cleaning, washing, pest control, body care, in medicines, food and pretty much everything else! With increasing awareness of the adverse effects from such chemicals, there's a significant need worldwide for health-safe and eco-safe products that can replace harmful chemicals in use today. The challenge: What are the innovations and concepts that can convert a large part of our household chemicals into natural and healthy products?