1. Air Pollution

Undoubtedly one of the most pressing environmental issues in India is air pollution. According to the 2021 World Air Quality Report, India is home to 63 of the 100 most polluted cities, with New Delhi named the capital with the worst air quality in the world. The study also found that PM2.5 concentrations – tiny particles in the air that are 2.5 micrometres or smaller in length – in 48% of the country’s cities are more than 10 times higher than the 2021 WHO air quality guideline level. 

Vehicular emissions, industrial waste, smoke from cooking, the construction sector, crop burning, and power generation are among the biggest sources of air pollution in India. The country’s dependence on coal, oil, and gas due to rampant electrification makes it the world’s third-largest polluter, contributing over 2.65 billion metric tonnes of carbon to the atmosphere every year.  

The months-long lockdown imposed by the government in March 2020 to curb the spread of Covid-19 led to a halt in human activities. This unsurprisingly, significantly improved air quality across the country. When comparing the Air Quality Index (AQI) data for 2019 and 2020, the daily average AQI in March-April 2019 was 656, the number drastically dropped by more than half to 306 in the same months of 2020.  

2. Water Pollution

Among the most pressing environmental issues in India is also water pollution. The Asian country has experienced unprecedented urban expansion and economic growth in recent years. This, however, comes with huge environmental costs. Besides its air, the country’s waterways have become extremely polluted, with around 70% of surface water estimated to be unfit for consumption. Illegal dumping of raw sewage, silt, and garbage into rivers and lakes severely contaminated India’s waters. The near-total absence of pipe planning and an inadequate waste management system are only exacerbating the situation. Every day, a staggering 40 million litres of wastewater enter rivers and other water bodies. Of these, only a tiny fraction is adequately treated due to a lack of adequate infrastructure.

In middle-income countries like India, water pollution can account for the loss of up to half of GDP growth, a World Bank report suggests. Water pollution costs the Indian government between USD$6.7 and $7.7 billion a year and is associated with a 9% drop in agricultural revenues as well as a 16% decrease in downstream agricultural yields.

Besides affecting humans, with nearly suffering from waterborne diseases like typhoid, cholera, and hepatitis and nearly 400,000 fatalities each year, water pollution also damages crops, as infectious bacteria and diseases in the water used for irrigation prevent them from growing. Inevitably, freshwater biodiversity is also severely damaged. The country’s rivers and lakes often become open sewers for residential and industrial waste. Especially the latter – which comprises a wide range of toxic substances like pesticides and herbicides, oil products, and heavy metals – can kill aquatic organisms by altering their environment and making it extremely difficult for them to survive.

3. Food and Water Shortages

According to the Intergovernmental Panel on Climate Change (IPCC), India is the country expected to pay the highest price for the impacts of the climate crisis. Aside from extreme weather events such as flash floods and widespread wildfires, the country often experiences long heatwaves and droughts that dry up its water sources and compromise crops. 

Since March 2022 – which was the hottest and driest month recorded in 120 years – the North West regions have been dealing with a prolonged wave of scorching and record-breaking heat. For several consecutive days, residents were hit by temperatures surpassing 40 degrees Celsius, while in some areas, surface land temperatures reached up to 60C. There is no doubt among experts that this unprecedented heatwave is a direct manifestation of climate change.

The heatwave has also contributed to an economic slowdown due to a loss of productivity, as thousands of Indians are unable to work in the extreme heat. The agriculture sector – which employs over 60% of the population – is often hit hard by these erratic droughts, impacting food stability and sustenance. Currently, farmers are struggling to rescue what remains of the country’s wheat crops, piling on existing fears of a global shortage sparked by the war in Ukraine.

Already among the world’s most water-stressed countries, the heatwave is causing further water shortages across the nations. Even though water tankers are keeping communities hydrated, the supply is not enough to cover the needs of all residents. But heat is not the only factor contributing to water scarcity. In an interview with the Times of India, lead researcher at Pune-based Watershed Organisation Trust Eshwer Kale described the national water policy as very ‘irrigation-centric’. Indeed, over 85% of India’s freshwater is used in agriculture. This has led to a crisis in several states, including Punjab, Haryana, and western Uttar Pradesh. The indiscriminate use of water for irrigation, coupled with the absence of conservation efforts and the huge policy gap in managing water resources has left over 10% of the country’s water bodies in rural areas redundant. A 2019 report predicts that 21 major cities – including New Delhi and India’s IT hub of Bengaluru – will run out of groundwater by 2030, affecting nearly 40% of the population. 

4. Waste Management

Among the most pressing environmental issues in India is also waste. As the second-largest population in the world of nearly 1.4 billion people, it comes as no surprise that 277 million tonnes of municipal solid waste (MSW) are produced there every year. Experts estimate that by 2030, MSW is likely to reach 387.8 million tonnes and will more than double the current value by 2050. India’s rapid urbanisation makes waste management extremely challenging. Currently, about 5% of the total collected waste is recycled, 18% is composted, and the remaining is dumped at landfill sites.

The plastic crisis in India is one of the worst on the planet. According to the Central Pollution Control Board (CPCB), India currently produces more than 25,000 tonnes of plastic waste every day on average, which accounts for almost 6% of the total solid waste generated in the country. India stands second among the top 20 countries having a high proportion of riverine plastic emissions nationally as well as globally. Indus, Brahmaputra, and Ganges rivers are known as the ‘highways of plastic flows’ as they carry and drain most of the plastic debris in the country. Together with the 10 other topmost polluted rivers, they leak nearly 90% of plastics into the sea globally. 

5. Biodiversity Loss

Last but not least on the list of environmental issues in India is biodiversity loss. The country has four major biodiversity hotspots, regions with significant levels of animal and plant species that are threatened by human habitation: the Himalayas, the Western Ghats, the Sundaland (including the Nicobar Islands), and the Indo-Burma region. India has already lost almost 90% of the area under the four hotspots, according to a 2021 report issued by the Centre for Science and Environment (CSE), with the latter region being by far the worst affected.

Moreover, 1,212 animal species in India are currently monitored by the International Union for Conservation of Nature (IUCN) Red List, with over 12% being classified as ‘endangered’. Within these hotspots, 25 species have become extinct in recent years.

Due to water contamination, 16% of India’s freshwater fish, molluscs, dragonflies, damselflies, and aquatic plants are threatened with extinction and, according to the WWF and the Zoological Society of London (ZSL), freshwater biodiversity in the country has experienced an 84% decline. However, given these activities’ dramatic consequences on biodiversity, committing to end and reverse deforestation should be a priority for India.