In this era of high environmental awareness, many people believe that it is absolutely beneficial to the earth's ecology to replace the original vehicle with a fuel-efficient motorcycle.

And another group of people thinks that this statement is completely wrong because the threat of motorcycles to environmental pollution is much more serious than that of cars. Who is right? What do you think?

One study selected three of the most popular cars and motorcycles in the 1980s, 1990s, and 2000s, and conducted actual road driving tests that included 75% highway and 25% urban.

According to the data from the portable exhaust gas detection instrument, the harmful exhaust gas emitted by motorcycles is much higher than that of cars!

According to the British "Daily Telegraph" report, a research team including scientists from the University of Cambridge recently found that small motorcycles produce far more pollution than large vehicles such as vans.

The study revealed that an idling motorcycle emits more than a thousand times more smog-causing "organic aerosols" than larger vehicles. This means that even though there are far fewer scooters on the road than sedans and vans, they "contribute" more to urban pollution.

In the manufacturing process of electric vehicle batteries, there are more serious problems than carbon emissions: to make electric vehicles run, the most basic three elements: battery, motor, and electronic control are indispensable.

For batteries and motors, the core material is tombarthite, such as neodymium, samarium, strontium, dysprosium, etc., which are the main raw materials of contemporary permanent magnets.

Among them, NdFeB is the key raw material in the "motor" element of electric vehicles because of the highest magnetic properties; and the "ternary material battery" commonly used in electric vehicles (nickel salt, cobalt salt, and manganese salt are adjusted in different proportions, so-called Ternary), and also need to add different rare earth elements to make the battery more stable.

Take Tesla as an example. In the past, its first-generation models used induction motors and did not use permanent magnets.

However, due to the technical barrier of power consumption and battery life, the electric car motors that came out later were all changed to (requires rare earth consumption) Permanent magnet motor systems.

Even if permanent magnets are not used or technical problems are overcome, the battery core of electric vehicles will inevitably use rare earth metals and precious metals according to the existing technology, which is almost irreplaceable.

As for "mining rare earth", it can be said that it is one of the most "unenvironmental" things in the world, just like "mining oil and coal" (or even worse).

Everyone uses public transportation as much as possible, and it is bound to be a little more "environmentally friendly" than driving by themselves (even electric vehicles).

From the perspective of urban transportation system planning, long-distance transportation is still partly fuel-dependent, while in short-distance or urban areas The use of battery power for transportation is a relatively energy-saving and efficient solution after comprehensive consideration of all parties.