The HS1 railway link to the Channel Tunnel has become the first train line in the UK to fully operate on renewable energy.
The trains operating between London and the Kent coast are powered by wind and solar energy.
HS1 stated that its power supplier had offered certificates that confirmed that the energy used by its trains and railway stations come from sustainable sources.
Domestic operator Southeastern High Speed and international operator Eurostar both provide services on the rail lines.
Eurostar trains link to the Channel Tunnel to connect the UK capital with other cities in Europe such as Brussels.
In a statement, HS1 said: “We continue to work with our international operator, Eurostar, and domestic operator Southeastern High Speed (LSER) to reduce the carbon footprint of every passenger by 25% and energy per train journey by 10%.”
The country has set a goal of achieving a zero-carbon transport system by 2050.
UK Rail Minister Chris Heaton-Harris said: “We are absolutely committed to driving forward a greener, cleaner and more efficient railway, and it is fantastic to see HS1 making such significant strides towards decarbonising their network.”
HS1 is owned by Equitix Investment Management and InfraRed Capital Partners.
The international services on the high-speed line remove 750,000t of CO2 every year while domestic services on the line annually eliminate the use of 6,000 lorries and cars.
Approximately four million of the 26 million people who use the firm’s international and domestic services have switched from using cars and aeroplanes, claimed HS1.