Why do we need sustainable solar energy?
The world population is growing and increasing numbers of people aspire to higher standards of living: we need more and more energy and food. We can only do this by producing energy and food in a sustainable way, which means creating less waste and lowering CO2 emissions. The sun is a source of energy that fulfils these conditions.
Photosynthesis is the process by which organisms use energy from sunlight to convert carbon dioxide (CO2) into carbohydrates, such as sugar (glucose). Plants or algae derive energy from these carbohydrates, and use this to create building blocks from which different parts – such as tubers, seeds, stems and leaves in plants – grow.