Generally, the words ‘green’ and ‘plastic' are seen opposite to each other in terms of their end-use and impact. Plastic is thought of as a product which kills the environment while green improves and sustains life. Photo: Rohit Mehra Ludhiana's Income-Tax department officials have used plastic for the purpose of greenery, creating and coining the idea of Green-Plastic Initiative. Photo: Rohit Mehra Unlike the conventional way, the team planted plastic bottles on the wall. For this, they first collected used and waste plastic bottles, bins and other plastic waste. This is then installed as containers or pots with small plants in it. Photo: Rohit Mehra These plants are watered with drip-irrigation — which saves water up to 10 times more than traditional watering techniques. Photo: Rohit Mehra In a span of 16 months, the team set up more than 325,000 plants of more than 80 different varieties. Photo: Rohit Mehra As per research conducted by Punjab Agriculture University (PAU) Scientists, the green walls could contain pollution up to 75 per cent. Further, green walls were helpful in containing noise pollution. Photo: Rohit Mehra