The Green Revolution: Achievements and Environmental Consequences

In the early 1960s, India was on the edge of a humanitarian disaster. Millions faced the threat of starvation, the country was heavily dependent on food imports under the US PL-480 program, and the memory of the 1943 Bengal Famine – which claimed around four million lives – was still fresh. Against this backdrop, one of the most consequential agricultural transformations in modern history was set in motion. The Green Revolution brought high-yielding crop varieties, chemical fertilizers, pesticides, and modern irrigation to developing nations – and in India, it worked spectacularly, at least in the short term. But decades later, the consequences of that transformation continue to reshape Indian agriculture, public health, and the environment.

India before the Green Revolution: a nation on the brink 🔗

When India gained independence in 1947, its agricultural system was fragile and underpowered. Traditional farming yielded just enough to sustain – and often not even that. By the early 1960s, India was so dependent on food imports that Prime Minister Lal Bahadur Shastri urged citizens to skip meals on certain days to save grain. The population was growing far faster than food production could keep up with, and the threat of large-scale famine was not hypothetical – it was imminent.

It was in this context that agricultural scientist M.S. Swaminathan – now recognized as the Father of the Green Revolution in India – collaborated with American agronomist Norman Borlaug to introduce high-yielding varieties (HYV) of wheat developed in Mexico. The first politician to back this approach was Chidambaram Subramaniam, then Minister of Agriculture, who was so committed to it that he turned his own lawn in Delhi into a demonstration plot. The sowed seeds gave results that convinced both government and farmers. The High-Yielding Varieties Programme was officially launched in 1965-66, and the Green Revolution took root.

The achievements: from food deficit to food surplus 🔗

The results were transformative by any measure. Wheat output rose from 12 million tonnes in 1965 to over 110 million tonnes by 2023, while rice production climbed from 35 million tonnes in 1960 to 138 million tonnes. Food grain production overall jumped from around 25 million tonnes in 1950 to 100 million tonnes by 1980 – a fourfold increase in three decades.

The miracle of IR8 rice 🔗

One of the Green Revolution’s most striking breakthroughs was the introduction of IR8, a high-yield, pest-resistant rice variety developed at the International Rice Research Institute (IRRI) in the Philippines. In 1968, Indian agronomist S.K. De Datta found that IR8 yielded about 5 tonnes per hectare with no fertilizer, and nearly 10 tonnes per hectare under optimal conditions – roughly 10 times the yield of traditional rice. The variety quickly earned the nickname “Miracle Rice.” In the 1960s, rice yields in India were around 2 tonnes per hectare; by the mid-1990s, they had risen to 6 tonnes per hectare.

Self-sufficiency and economic transformation 🔗

India became one of the world’s most successful rice producers and is now a major exporter, shipping nearly 4.5 million tonnes in 2006. The country that once relied on international food aid formally ended its dependence in 1971 when it became food-sufficient. Farm mechanization also surged – the number of tractors in India grew from 37,000 in 1960 to over one million by 1990 – and the broader industrial economy benefited from demand for agricultural machinery. Punjab and Haryana saw huge gains in production, and India achieved a level of food security that once seemed impossible.

The limits of the Green Revolution 🔗

The Green Revolution was not a uniform success across India. Its benefits flowed mainly to states that already had irrigation infrastructure and financially capable farmers. While Punjab, Haryana, and western Uttar Pradesh derived significant gains, states like Bihar, Assam, West Bengal, and Orissa saw much slower agricultural growth. Small and marginal farmers, who lacked access to credit, could not afford the new inputs – the HYV seeds, fertilizers, and pesticides that the new varieties demanded. The Green Revolution solved hunger at the national level, but it deepened economic inequality within agriculture.

The environmental aftermath: when the costs became clear 🔗

The Green Revolution was built on a simple but ecologically demanding formula: more chemical inputs, more water, more yield. For decades, this formula delivered results. But by the 1980s and 1990s, the environmental consequences began to surface – and they were severe.

Soil degradation and loss of fertility 🔗

Intensive agriculture during the Green Revolution brought significant land and water problems, including soil degradation, over-exploitation of groundwater, and soil pollution from high doses of fertilizers and pesticides. Continuous monocropping of wheat and rice exhausted soil micronutrients. The repetition of crop cycles depleted soil nutrients, and since crop residues and organic matter were not returned to the soil, intensive cropping systems caused major loss of soil organic matter. The application of pesticides and fertilizers also led to the accumulation of heavy metals – including cadmium, lead, and arsenic – in agricultural soils.

About 60% of the geographical area of Green Revolution states now faces some form of soil degradation, including waterlogging, salinity, and alkalinity – threats that are increasingly undermining the very food security the revolution was meant to secure.

Groundwater depletion 🔗

The HYV crops, especially rice, required enormous quantities of water. Excessive irrigation has led to over 80% of Punjab’s water units being classified as overexploited, according to the Central Ground Water Board. Canal systems and irrigation pumps drew heavily from the groundwater table to supply water-intensive crops like sugarcane and rice, and it is now predicted that Punjab could face serious water scarcity in the coming years. Rivers and canals were diverted, disrupting local ecosystems. In some areas, the water table has been rising more than a metre annually since 1985, causing waterlogging and salinity problems at the farm level.

Pesticide pollution and biodiversity loss 🔗

Excessive and inappropriate use of fertilizers and pesticides polluted waterways and killed beneficial insects and wildlife. Heavy dependence on a few major crops also led to significant loss of agricultural biodiversity. Traditional crop varieties and indigenous seeds were largely abandoned in favor of HYVs, narrowing the genetic base of Indian farming and making crops more vulnerable to new pest outbreaks and diseases.

Pesticides released into the environment through air drift, leaching, and runoff contaminate soil, surface water, and groundwater – and pesticide residues have been detected in both marine and terrestrial animals through processes of bioconcentration and biomagnification.

Pesticide residues in food and the human health crisis 🔗

Perhaps the most alarming consequence of Green Revolution-era farming is its effect on human health. Research indicates that over 40% of food items in India contain pesticide residues, with significant contamination found in milk, river sediments, and drinking water – including banned pesticides such as endosulfan.

Punjab: the “cancer belt” 🔗

Punjab was the epicenter of the Green Revolution – and it is now ground zero for its human health consequences. Despite accounting for just 1.5% of India’s land, Punjab accounts for nearly 20% of the country’s pesticide consumption, using an alarming 5,270 metric tonnes annually – with the highest per-capita pesticide use in India. A study from Ludhiana found that 6.9% of cow’s milk samples contained pesticide concentrations – including DDT and endosulfan – exceeding acceptable limits, and researchers have also found harmful metals such as arsenic, lead, and uranium in the groundwater of Punjab’s Malwa region.

The human cost is captured most starkly in a single train. The Bathinda-to-Bikaner train, which departs each night carrying cancer patients from Punjab to a specialist treatment center in Rajasthan, has earned the grim nickname “the Cancer Train” – a symbol of the public health crisis linked to decades of pesticide overuse. Workers and communities engaged in agricultural activities face significant health risks through inhalation and dermal contact with pesticides, contributing to increased incidence of cancer and other chronic diseases. A public health expert who worked in southern Punjab for over 25 years noted that the entire area is overloaded with pesticides and that the chronic effects “take generations or decades to manifest.”

Residues beyond Punjab 🔗

Scientific surveys conducted over 45 years have found residues of fertilizers and pesticides – including nitrates, organochlorines, organophosphates, and carbamates – at levels above permissible limits in milk, dairy products, water, livestock feed, and other food products. Increasing pesticide use has also disrupted pest predator-prey balances, creating overpopulations of certain pest species and driving farmers to apply even more chemicals – a cycle that deepens dependency and contamination.

The sustainability question 🔗

A 2014 study found that Indian children exposed to higher quantities of fertilizer agrochemicals experienced more adverse health impacts. Although the Green Revolution improved agricultural output in the short term, its yield rates have been declining while its social and environmental costs have become more clearly apparent. The core issue is that the Green Revolution was designed with one objective: to maximize food production. Environmental impacts were simply not taken into account when the model was designed.

The aftermath has prompted a growing shift toward alternative approaches. In many Green Revolution areas, increasing numbers of farming families are experimenting with alternative systems of land management, including organically grown, chemical-free food production. Farmers who have made the switch note that while initial yields may dip, the quality of the soil improves steadily – and after two to three years, yields tend to recover to comparable levels without the chemical load.

What India needs now – and what a growing number of agricultural scientists, policymakers, and farmers are calling for – is not a rejection of productivity, but a redefinition of it. Sustainable agriculture, crop diversification, organic methods, and integrated pest management offer a path forward that doesn’t require choosing between feeding the population and protecting the land and people that feed it. As research published by Down To Earth notes, the lessons of the Green Revolution point clearly toward agricultural models that balance productivity with ecological and social sustainability.

What do you think? The Green Revolution solved one crisis but created another – is it possible to feed a billion people without compromising the health of the soil, water, and communities that sustain agriculture? And given what we now know about pesticide contamination and soil degradation, should food production targets always take priority over environmental limits?

References

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13. https://www.researchgate.net/publication/283227979_Green_revolution_in_India_Environmental_degradation_and_impact_on_livestock
14. https://www.downtoearth.org.in/agriculture/green-revolution-was-coined-57-years-ago-this-month-it-is-time-to-reassess-its-legacy