Breathing Barrier — a new way to block acid rain, air pollution. Air pollution is an urgent environmental issue needing to be solved. The emissions of vehicles and PM 2.5 cause acid rain and pollution. Moss can grow on the roadside in emissions, and can also absorb vehicle emissions as a nutrient. It's why we hope to improve pollution problems through the combination of these. Our design has considerable filtration and pollution functions; in the future, we can effectively solve the problem of air pollution and environmental afforestation.