Increased burning of fossil fuels like coal and oil over the last two centuries has released greenhouse gases like CO2 into the atmosphere, which have warmed our planet.
Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.
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The original plan had been to begin the phase out and stop the importation of petrol and diesel vehicles from 2030.