In these large demolition projects, social vulnerability is also a concern and the techniques used in respect of demolition are in direct correlation with the number of inhabitants around the area.
As the whole world faces major environmental risks, the non-compliance with environmental laws and regulations in the recent case of Noida Twin Towers has raised global concern. In the event of demolition, approximately 3700 kg of explosives were drilled in the 9000 holes made in different parts of the concrete used in the tower. This is expected to emit around 35,000 cubic meters of debris and a cloud of dust and could pose serious environmental hazards and cause respiratory ailments in the elderly and children living nearby.
Waste of resources is a primary concern of conservationists like Vikrant Tongad who estimates the building needed steel, labor and energy and more than 10 million liters of water. water, and demolition will turn all these resources into mere unusable waste. .
Wind direction during demolition also plays an important role and around 300 truckloads of debris have to be picked up during demolition, including the steel structure. The main agenda should be the sustainable development of this debris and the recycling and reuse of the materials thus recovered.
What is most important in this regard is that the twin towers have replaced a green park, and the whole process of removing debris and building a park in its place could take up to 1 year according to environmental experts.
In these large demolition projects, social vulnerability is also a concern and the techniques used in respect of demolition are in direct correlation with the number of inhabitants around the area. After the safety audits, the cascade demolition technique will be used which will follow a process of blasting the basement first, then the 2nd floor and then the other floors respectively.
According to Dr. Sachchida Nand Tripathu from IIT Kanpur, there will be high levels of PM10 for a few days. PM2.5 levels also need to be disrupted, but PM10 levels need to be released in greater amounts with risky demolition, which means concrete used for construction needs to emit more of the larger particles and coarse.
House of Stray Animals, an NGO prayed for a dummy explosion or fake shot before the final implosion to save the large number of birds in the area and NGO owner Sanjay Mahapatra believes the explosion could have killed several birds in the area, mostly by suffocation in dust clouds.
In its study, the Center for Science and the Environment found that only 1% of construction and demolition (C&D) waste is recovered and recycled, especially at a time when the industry as a whole is facing shortage of materials. India generates around 150 million tonnes of C&D waste every year while the recycling capacity is 6,500 tonnes per day. This demolition therefore added to the risk of not being able to meet the conditions for reducing particulate pollution by 20 to 30% by 2024 in accordance with the NCAP program.
The most important compliance that can significantly improve the environment is to follow the Construction and Demolition Waste Rules and Regulations of the Ministry of Environment, Forests and Climate Change, 2016, which made it mandatory to reuse waste materials. recycled materials. The Bureau of Indian Standards has also allowed the use of recycled materials and treated C&D waste. Thus, compliances in cases of illegal construction carry a greater responsibility to have a consolidated plan and the Supreme Court orders in this case must have taken into consideration the ecological impact, in reference to the 2016 rules which state that ” the service provider must prepare a comprehensive plan for managing the waste generated in their jurisdiction” and “dispose of all construction and demolition waste in consultation with the relevant local authority, either by themselves or through any agency It is only time for all of these local agencies and pollution control boards to develop an inclusive program, even for small demolition activities.