Tidal forces all gone as debris moves away from impact. Earth rotation may be affected by loss of moon resulting in catastrophic orbital wobble (poles go to equator and vice versa). Debris rains down on the Earth. Meteor storms. Life in the oceans not finding tides will greatly be impacted like no reproduction; thus, massive die off of species. Magnetic field may be impacted by orbital wobble.

The young can improve their eyesight using eye muscle exercises. Or... remind students to look far away every time you focus on something up close like iPhones, which do more damage to eyesight than books.

It depends on how they handle engine failure.

Most people do not believe, but a cylinder is an aerodynamic structure. A rotating cylinder flies as long as air is moving through the tube.

They reverse osmosis water and then fill an aquifer that filters the water further in San Jose.

The other hypothesis referred to is that this planet is a living being. Every time something happens, a counter process counteracts any changes. More carbon dioxide is produced, the more life absorbs. Unfortunately, we are releasing carbon dioxide from millions of years ago and the planet cannot cope. Same with plastic garbage although life still finds a way to utilize it. Plankton will utilize plastic garbage as anchor points and create miniature colonies that nurseries of marine animals proliferate in.

Note the planet’s way of coping is limited. Polar ice has melted and no way for the planet to compensate.

Scarlett Johansson movie Lucy is hinting at just that. We are part of an organism exploring this universe. We just do not have the brain capacity to realize it. The basic unit, a cell, can choose to either be immortal or reproduce. Every single life in this universe is made up of the same basic unit. The only deviation are viruii that infect and destroy cells. Maybe, an immune system of this universe?

China wants a monopoly. No more computer chips for you.

US environmental policies do not allow wafer fabrication. They can build a wafer fab, but the EPA will shut it down due to hazardous chemicals esp in proximity to residential neighborhoods. Silicon Valley polluted a lot of cities before being shut down. Can’t happen in the US unless you confiscate all of those land trusts and make them foundries. In case you want to see the type of environmental damage, take a look at the superfund sites in California.

https://www.epa.gov/superfund-redevelopment/superfund-sites-reuse-california

https://www.discovermagazine.com/the-sciences/traversing-the-cosmos-with-a-little-help-from-my-friends-pt-ii

Someone postulated you could go anywhere in the solar system with planetary gravity assists.