It looks cool, but that is a horrible handle. You want it to be wood or plastic so it dampens vibrations as much as it can, and smooth so one hand can slide down the handle from near the head to your other hand at the end as you swing. A couple minutes breaking up concrete with that and your hands would be numb, tingly, and probably bloody. Gloves would help, but using this will always suck.

They can’t reproduce, should be fine.

Airbags are not forbidden in aircraft. They just haven’t been considered to offer enough safety benfit for their weight and cost in most cases. That is starting to change though, and airbags integrated into aircraft seatbelts are becoming more common. They can be found in first class in a number of commercial aircraft, and are sold to be retrofitted into private planes.

https://en.m.wikipedia.org/wiki/Airplane_airbags

https://www.amsafe.com/product/airbag-restraint-systems/

There are many reasons I doubt this car will make it into commercial production, but the airbags will be OK.

Very true. Unfortunately, this process just pulls gold from dilute sources and gathers it into nuggets, from small ones to very very large. No gold is being made new though, that would be great.

Well, that is the amount gold that is mined or recycled every year that is used in electronics. The thing is though, a lot of the gold used in electronics is never recovered. So a considerable amount of the gold used in electronics is removed from from circulation in a way the gold in jewelry or bullion or coins isn’t. It isn’t the primary driver of gold’s price increase, but it is a significant factor.

Gold prices have risen steadily for a long time, partly because of its use in electronics. Over $2500/ounce now. But another quirk of gold is the ease with which we can make very thin coatings of it over other materials, sometimes only a few atoms thick. So it is commonly used, but in very very small amounts per device.

The first change needs to be teams pay for their own stadiums instead of them being taxpayer funded from cites and states. I don’t care if it will drive tourism, use that money to take care of the purple in the city and make the city a nice place, even make it a nice place for a stadium, but make the team owners/pro leagues pay for their own damn stadium.

Growing crops to make ethanol is not particulatly green. In fact, in most existing production loops we would be better off environmentally to just burn pure gasoline than produce the ethanol to mix into it, unfortunately. Too much water, too many tractors and trucks, and way too much electricity into ethanol production to be worth what we get out of it. And the bit of carbon the crops sequester doesn’t overcome it. Electric vehicles are by far the greenest option right now.

It won’t have started getting closer again before the Milky Way collides with the Adromeda galaxy in 5 Billion years, so it and anything we send on a similar path isn’t coming back.