Motorbikes in general, especially the cheap 125 cm^3 that are ubiquitous in the developing world, pollute horribly - especially relative to the power they generate.
I wonder when electric power trains will get cheap enough to replace them. Today, a rather bad electric-assisted bicycle is about the same price - so no one will buy one when for the same price they can get the rugged underpowered noisy smog-spewing mule that bears all the light duty transport imaginable and that everyone knows how to maintain.
In India, solar charging of mopeds might work good enough without a network, but I fear population density (10,000 per km²) and, ironically, the smog are holding that back. Solar might also be problematic in the monsoon season.
I wonder when electric power trains will get cheap enough to replace them. Today, a rather bad electric-assisted bicycle is about the same price - so no one will buy one when for the same price they can get the rugged underpowered noisy smog-spewing mule that bears all the light duty transport imaginable and that everyone knows how to maintain.