Growing crops for food has been a major human activity for a long time. The rapidly increasing world population means that the need to provide enough food without destroying our environment is one of the biggest challenges facing us. This module looks at the processes that occur as plants grow and decay, and farming processes that can be used to optimise crop yields. In this topic you will look at the relationship between the properties of substances and their structure and bonding. We will also study the redox chemistry of nitrogen.