Although Bitcoin is a virtual currency, the energy consumption associated with its use is very real
Lawmakers have also raised concerns over Facebook's spotty record on privacy and data protection
Libra will also face additional concerns from international regulators and lawmakers, which could further delay its progress
Facebook's new currency plan under scrutiny in Congress
India, meanwhile, has throughout maintained that cryptocurrencies were illegal and it did not recognise such activities
Such a sweeping proposal would likely spark opposition from Republican members of the house who are keen on innovation, and would likely struggle to gather enough votes to pass the lower chamber
Politicians and financial regulators across the world have called for scrutiny of Facebook's Libra coin, with concerns ranging from consumer protection and privacy to its potential systemic risks
Libra, which is widely regarded as a challenger to dominant global player Bitcoin, is expected to launch in the first half of 2020
Cryptocurrency has flourished since Bitcoin launched in 2009. But when Facebook unveiled plans last month for its own virtual currency, Libra, the announcement rattled financial regulators