Over one lakh mature trees chopped in Assam in 10 yrs; experts worried in absence of impact study
Guwahati (PTI): More than one lakh mature full-grown trees have been felled across Assam since May 2016, when the BJP formed its first government in the state, for various public and private projects, according to official records.
The Assam government, on the other hand, said that all these trees were cut in "dire necessity" to develop the projects, while more than 3.5 crore saplings have been planted in the last two years alone to compensate the loss in green cover.
However, experts from different state-run institutions opined that cutting so many trees have resulted in "significant ecological loss" and comparing felling of mature trees with planting saplings is "problematic", while terming it "scientifically concerning" for no study to assess the impact.
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Replying to a set of queries sent to the Principal Chief Conservator of Forest (PCCF) through an application under the Right to Information Act, 15 out of 44 wildlife and territorial divisions across Assam have said that 1,06,896 trees have been felled so far since May 2016.
A set of 11 queries were submitted to the Office of the PCCF & Head of Forest Force under the Environment, Forest and Climate Change Department of the Assam government. It was forwarded to 43 divisions across the state.
Apart from the 15 divisions that provided data, 12 more responded to the RTI application but did not give any information related to tree felling.
No reply has come from the remaining 16 divisions at all so far.
None of the 27 divisions that responded to the queries have conducted any study on the impact on ecology for cutting these huge numbers of trees over the years.
When contacted, Assam Environment, Forest and Climate Change Minister Chandra Mohan Patowary told PTI that the trees were cut for oil exploration projects as well as infrastructure development.
"These trees have been cut across the state for various development projects. It was a dire necessity to fell the trees for different projects," he added.
Giving examples, Patowary said a huge number of trees were cut for the four-laning of National Highway-17 from Guwahati to Goalpara and construction of the Darrang Medical College and Hospital (DMCH).
"In most places where trees were cut, roads have been developed -- mainly the national highways. Besides, ONGC and Oil India are also exploring crude and developing wells at new locations. For that too, some trees were felled," he added.
The DMCH is being built at a location where there was a silk plantation. So, the entire area was cleared for construction work, the minister said.
"We have planted a huge number of saplings against these felled trees. In 'Amrit Briksha Andolan', we planted one crore saplings in a single day. There are other schemes also. We have planted a total of 3.5 crore saplings in the last two years," he added.
According to the RTI data, most of the responding authorities said that more than 70 per cent saplings have survived after proper care.
Over 26,000 trees have been felled in notified forest areas since May 2016, while the remaining have been cut in non-forest locations.
Nearly 84,000 trees were chopped for various government projects like construction of roads, bridges, flyovers, factories and buildings such as medical colleges, police battalions and all other structures. More than 10,000 trees have been felled for private works.
The available information shows that almost 65,000 trees have been logged from 2021 to 2025 during Chief Minister Himanta Biswa Sarma's tenure. Over 18,000 trees were removed during his predecessor Sarbananda Sonowal's period.
When contacted, Cotton University Environmental Biology & Wildlife Sciences Assistant Professor Narayan Sharma told PTI that equating the felling of mature trees with planting saplings is "problematic".
"A full-grown mature tree represents decades of ecological value that cannot be quickly or easily replaced. In most cases, sapling plantations hardly compensate for the loss of mature trees immediately, as it takes decades for them to provide comparable ecosystem services, if they survive at all to the adult stage," he added.
On the absence of a study to assess the impact of felling such a huge number of trees, Sharma, an expert of biodiversity conservation, said that when large numbers of trees are felled at a particular location, a proper ecological impact assessment "must be conducted".
He stressed that such a study or research is necessary to ascertain the damage to local microclimate and biodiversity ecosystem, including its hidden impact on human physical and mental health.
Expressing similar sentiments, Gauhati University Assistant Professor (Environmental Science) Minakshi Bora said that as an environmental science teacher, she would interpret this RTI data with caution and concern.
"I would say the numbers appear impressive, but they are not directly comparable. Felling over one lakh mature trees and planting saplings are ecologically unequal actions."
A mature tree represents decades of biomass, carbon storage, habitat value and ecosystem services that a sapling cannot immediately replace, she added.
Bora, a GIS and Ecohydrology expert, also commented that not conducting the impact assessments in respective divisions is "scientifically concerning".
"Without systematic study, cumulative ecological degradation may go unnoticed until impacts become severe and irreversible," she added.
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Cong slams govt on rising pollution, demands review of National Ambient Air Quality Standards
New Delhi (PTI): Expressing concern over rising pollution levels, the Congress on Sunday demanded an urgent review and upgradation of the National Ambient Air Quality Standards, 2009, and asserted that they must be enforced as well as monitored more effectively everywhere.
Taking a swipe at Prime Minister Narendra Modi, Congress general secretary in-charge communications Jairam Ramesh said, "PM 56-inch has been exposed, PM 2.5 is for real."
Ramesh also said the National Clean Air Programme (NCAP) itself needs a laser-like focus on PM2.5.
"PM2.5 that is, particulate matter with a diameter of less than 2.5 micrometers or lower measured in micrograms per cubic meter of air as emerged as the cause for a severe environment-public health crisis across the country," the former environment minister said on X.
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A study published in The Lancet Planetary Health in December 2024, based on data from 655 districts over 2009-2019, found that every 10 microgram per cubic metre increase in PM2.5 concentration leads to an 8.6% increase in mortality, Ramesh pointed out.
The 2025 Lancet Countdown estimates that about 17.2 lakh Indians die every year from exposure to PM2.5, a 38% increase since 2010, he said.
The Ministry of Environment, Forests and Climate Change has repeatedly told Parliament in 2024, 2025 and again in 2026 that deaths on account of air pollution "cannot be conclusively established", he pointed out.
Meanwhile, the Indian Council of Medical Research (ICMR), the Health Ministry's own research body, has endorsed the Lancet findings, attributing 12.4 lakh deaths in 2017 to air pollution, that is 12.5% of all deaths that year, Ramesh said.
Now, the Centre for Research on Energy and Clean Air (CREA) has done a detailed analysis of the data generated by the continuous ambient air quality monitoring stations operated by the Central Pollution Control Board (CPCB), he said, adding that the data covers the period October 1, 2025 to February 2026 for 238 cities.
The conclusions are very disturbing and should be yet another wake-up call to all those who are in denial mode, he said.
Citing the analysis, Ramesh said none of the 238 cities complied with the WHO safe guidelines for PM2.5.
"In 204 of the 238 cities PM2.5 concentrations were above the levels set by the National Ambient Air Quality Standards (NAAQS) that were promulgated way back in November 2009. Subsequently, the WHO announced its updated safe guideline in September 2021," Ramesh said.
The Indian standard for the annual average concentration of PM2.5 is now 8 times weaker than the WHO guideline, he said.
The National Clean Air Programme (NCAP) launched in 2019 has made very little impact on PM2.5 concentrations, he claimed.
PM2.5 concentrations complied with the NAAQS, 2009 safe level only in 12 of the 96 NCAP cities, Ramesh pointed out.
"Over Rs 13,400 crore has been released under NCAP and XV Finance Commission grants since inception, with 68% spent on road dust management.The NCAP benchmarks itself against PM10, the coarser and less lethal pollutant, not PM2.5," he said.
While the top polluted cities are in the National Capital Region covering Delhi and parts of Haryana and Uttar Pradesh, other states like Punjab, West Bengal, Gujarat, Maharashtra, Bihar, Odisha and Madhya Pradesh have a very high proportion of polluted cities that exceed the standards, Ramesh said.
There are 50 cities where continuous data availability is less than 80%, while there are some monitoring stations where no data was available for even a single day, Ramesh said.
"The National Ambient Air Quality Standards, 2009 need urgent review and upgradation. They also must be enforced and monitored more effectively everywhere. In addition, the NCAP itself needs a laser-like focus on PM2.5," the Congress leader asserted.
