Electric cars have so many advantages over internal combustion engines, that there's only really two things left against them - range per unit of weight, and battery cost.
People often talk about the cost of the batteries as they are created - especially the somewhat dubious places that lithium is often sourced from - but the other end of the cycle is just as problematic, as recycling these batteries is not nearly as easy as it could be.
It's not that it's uneconomical on the face of it - what better place to get refined lithium and rare earth metals than something with them already refined and separated? Instead, it's the lack of standardisation, hard-to-undo construction with lots of glue, and labelling of what exact kind of battery chemistry is used.
We need a lot of work put in on all three, so recycling companies can easily work out what they're dealing with and extract the good bits, rather than only understanding a few major brands and handling those. It's still a better thing to aim for than pumping the air full of fossil fuel remnants, though.
Beaming power wirelessly has always been one of those seemingly unachievable things that people keep trying anyway. Wireless phone chargers already lose about 50% of their power in the process, though, so how can we hope to go further than a centimetre or so?
Well, efforts have been continuing, and they've got pretty decent, though there's still the unavoidable side-effect that if you're beaming several kilowatts (or more) of power through the air, anything in the way tends to get a little bit... cooked.
The most recent innovation here was a virtual guard around the beam that cut it off if something strayed into the path (to avoid it getting cooked), but we still seem a little bit far away from the ultimate goal of beaming power from giant space-based solar panels down to the ground.
Silicon-based solar cells have come a long way in the last 70 years, but they're still kind of expensive and energy-intensive to produce. That's why it's particularly interesting that one of the alternative semiconductors - perovskite - appears to finally be getting more viable.
It can be created at room temperature, and it's a lot more flexible than silicon-based panels, with the slight tradeoff that they used to only last a few minutes. Thankfully, that's now been extended to "30 years under ideal outdoor conditions", which is hopefully at least 10 years in practice.
Like all materials advances, it'll take a while to come into its own and compete on price and efficiency, but any advance in solar power is a good one!