New Delhi

The Congress on Thursday claimed that the redefinition of the Aravallis would render over 90 per cent of the hills unprotected and open them up for mining and other activities.

In a post on X, Congress general secretary Jairam Ramesh said there is no connection between Prime Minister Narendra Modi's "global talk and local walk" when it comes to environmental concerns.

The Modi Sarkar’s redefinition of the Aravallis, that goes against all expert opinion, is dangerous and disastrous.

According to the Forest Survey of India’s data that is authoritative, only 8.7% of the Aravalli hills that are higher than 20 meters exceed 100 metres. If we take…

— Jairam Ramesh (@Jairam_Ramesh) December 25, 2025

He also accused the government of launching a determined assault on ecological balance by weakening environmental protection laws and loosening pollution norms.

Under the new definition, an "Aravalli Hill" is a landform with an elevation of at least 100 metres above its local surrounding terrain and an "Aravalli Range" is a cluster of two or more such hills within 500 metres of each other.

"The Modi Sarkar's redefinition of the Aravallis, that goes against all expert opinion, is dangerous and disastrous.

"According to the Forest Survey of India's data that is authoritative, only 8.7 percent of the Aravalli hills that are higher than 20 meters exceed 100 metres. If we take all Aravalli hills identified by FSI, not even 1 percent exceeds 100 meters. The FSI believes, and rightly so, that height limits are dubious and ALL of the Aravallis irrespective of height should be protected," Ramesh said.

"In terms of area, this means that well over 90 percent of the Aravallis will NOT be protected by the new redefinition and could well get opened up for mining, real estate, and other activities that will further damage an already ravaged ecosystem," the former environment minister said.

This plain and simple truth cannot be covered up, Ramesh said.

"This is yet another example of the Modi Sarkar's determined assault on ecological balance that includes loosening of pollution standards, weakening of environment and forest laws, emasculation of the National Green Tribunal and other institutions of environmental governance," he said.

"There is simple (simply) no connection between the PM's global talk and his local walk when it comes to environmental concerns," the Congress leader said.

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After a row over the redefinition of the Aravallis, the Centre on Wednesday issued directions to states for a complete ban on granting new mining leases within the mountain range.

The Ministry of Environment and Forests has also directed the Indian Council of Forestry Research and Education to identify additional areas and zones in the entire Aravallis where mining should be prohibited over and above the areas already prohibited for mining by the Centre.