Soil organisms play a crucial role in boosting food production, enhancing nutritious diets, preserving human health, remediating polluted sites and combating climate change, but their contribution remains largely underestimated, FAO said in its first ever report on "The State of Knowledge of Soil Biodiversity". Despite the fact that biodiversity loss is at the forefront of global concerns, the biodiversity that is below ground is not being given the importance it deserves and needs to be fully taken into account when planning interventions for sustainable development, the report says.