Explanation:

 Organic farming is eco-friendly because:

1 - organic food production eliminates soil and water contamination. Since organic food production strictly avoids the use of all synthetic chemicals, it does not pose any risk of soil and underground water contamination like conventional farming which uses tons of artificial fertilizers and pesticides.
2 - organic food production helps preserve local wildlife. By avoiding toxic chemicals, using of mixed planting as a natural pest control measure, and maintaining field margins and hedges, organic farming provides a retreat to local wildlife rather than taking it away its natural habitat like conventional agriculture.
3 - organic food production helps conserve biodiversity. Avoidance of chemicals and use of alternative, all natural farming methods has been shown to help conserve biodiversity as it encourages a natural balance within the ecosystem and helps prevent domination of particular species over the others.
4 - organic food production helps the fight against global warming. Most organically produced food is distributed locally. As a result, less energy is used for transportation which automatically reduces carbon dioxide emissions which are believed to be the main cause of global warming.