One of the most important environmental issues in Iran is the problem of air pollution. As one of the important elements in urban planning and management, green space has significant effects in controlling and improving the air quality in cities. Considering that plants play a vital role in reducing air pollution by receiving harmful gases such as CO and CO2 and converting them to O2 in the process of photosynthesis, by increasing the leaf area and the efficiency of photosynthesis, it is possible to trap harmful atmospheric gases and multiply oxygen production. Khazra Chelated Nano fertilizers, manufactured based on advanced Chelate Compounds technology, can increase the leaf area and the efficiency of photosynthesis up to 2.5 times.