What Is Artificial Rain? Delhi Govt Seeks Centre’s Help To Combat Toxic Smog

Amid the worsening air quality in Delhi, the Aam Aadmi Party (AAP) government has urged the central government to initiate artificial rain, or cloud seeding, to clear the toxic smog enveloping the city. Delhi Minister Gopal Rai made the formal request, accusing Union Environment Minister Bhupender Yadav of neglecting the national capital's repeated pleas to convene an emergency pollution meeting.

The deteriorating air quality in Delhi has reached hazardous levels, with the Air Quality Index (AQI) soaring to a staggering 493 on Monday. The thick, persistent smog has not only impaired visibility but has also triggered serious health concerns among residents, with many complaining of sore throats, headaches, and difficulty breathing. Rai emphasized the urgency of addressing the crisis and suggested that artificial rain, a technique explored by experts, could provide immediate relief.

What is Artificial Rain and How Does it Work?

Artificial rain, or cloud seeding, involves releasing chemicals like silver iodide, dry ice, or potassium iodide into clouds, causing them to form and trigger rainfall. The process helps in increasing the density of clouds, thus enhancing the chances of precipitation. The Delhi government, in consultation with IIT Kanpur experts, has explored this method as a potential solution for mitigating the smog and improving air quality.

The idea of cloud seeding isn't new. Experts, including Sachchida Nand Tripathi, the dean of IIT Kanpur's Kotak School of Sustainability, have emphasized that while the process could be effective, its success depends on various weather conditions that are beyond human control. As Tripathi noted, the outcome of cloud seeding is uncertain, and while it may bring temporary relief, further experimentation is needed to perfect the technique.

Challenges with Artificial Rain

While the method holds promise, artificial rain hasn't been implemented in the past due to unfavorable weather conditions. In 2023, the Delhi government had considered using cloud seeding to combat pollution, but the plans were eventually abandoned. Moreover, the recent attempt by the Resident Welfare Association (RWA) in Gurugram, which used sprinklers from a high-rise building to create "artificial rain," failed to show any significant improvement in air quality, raising questions about the feasibility of such initiatives.

Experts like IIT Kanpur's Manindra Agrawal suggest that while artificial rain could provide a temporary respite from pollution, it should not be relied upon as a long-term solution. Artificial rain could potentially offer the NCR a week-long break from poor air quality, but the persistent nature of pollution in the region calls for more comprehensive measures.

Financial Implications of Artificial Rain

The financial cost of cloud seeding is a significant factor in determining its viability. According to the IIT-Kanpur team, the project would cost approximately Rs 1 lakh per square kilometer. The Delhi government has reportedly agreed to bear the initial costs of Phase 1 and Phase 2 of the artificial rain pilots, which could amount to around Rs 13 crore. However, the project's success hinges on the Centre's cooperation, as Rai has requested the Union Environment Minister to urgently convene a meeting to discuss the matter.

The Road Ahead

With Delhi grappling with the severe consequences of pollution, the Delhi government has called on Prime Minister Narendra Modi to step in and intervene. Rai described it as the Prime Minister's moral responsibility to address the air quality crisis and support the Delhi government's efforts to mitigate pollution.

While artificial rain may offer a short-term fix, experts stress that more sustainable, long-term measures must be adopted to tackle the root causes of pollution. The central and state governments, along with local agencies, will need to work in unison to enforce stricter regulations on vehicular emissions, industrial pollutants, and crop burning, which continue to worsen Delhi's air quality year after year.

In the meantime, the authorities continue to monitor the situation, and measures like the Graded Response Action Plan (GRAP) restrictions are in place to curb pollution levels in the region. As the capital braces for another winter of toxic air, the focus remains on both immediate and long-term strategies to safeguard public health and improve the city's air quality.