Can electromagnetic radiation be ionized away, or cavitated, or sonically ruptured through resonance, or perhaps radio frequency interference, can you remove unwanted radiation in the atmosphere with fairly simple means?

You answered the question wonderfully. Thank you. Time dilation comes into play because of size of the massive object. Since the sun is 100x bigger than earth, time is perceived to go much slower. The passage of time happens based on gravitational potential and velocity, so when the sun says 10 billion years, its more like 100 million years of duration on earths time scale. But like you said, as long as there is a power source it won't end, so how does a star run out of hydrogen in an endless sea of it?

So is fusion not limitless? If a star uses fusion in its process and lasts only 10 billion years, then what chance does a man-made device have for lasting even close to that long with time dilation in play?

What has played a bigger roll in medicine, biochemistry or synthetic chemistry?

Also if you want to get freaky. The industry standard could be easily set to include more vitamins in food, and everyone would just get a balanced amount throughout a day without even noticing

Or a new adduct of vitamin D can be created like elephant tranquilizer or meth, that is 100x stronger than fentynal or amphetamine. Then even people with strong deficiency can get what they acquire. Just don't do too much or calcium stones might form and various other health problems associated with too much vitamine D

Theoretically its completely possible. Using yeast fermentation, specific enzymes can be targeted and reproduced rapidly with high purity through very meticulous chloroplast extractions. Then the enzyme would be introduced over generations of your plant variety, in hopes of mutations to produce a stellar variety for you specific purpose. Yeast fermentation isn't necessary, but much faster than having fungus grow next to your plant and cloning the mutants from there

The problem with that is "Plants are producers, using the energy of the sun to make seeds, cones, and spores to reproduce, while fungi are decomposers that break down decaying matter" - National Wildlife Federation

Yes, look at the first link. Oyster mushrooms are edible, and mushrooms convert compost (or waste) into chitin and other cellular structures of the mushroom body. Scientists used to believe that it would make you sick to eat the mushrooms that decompose toxic items, now it has been proven false up to an extent. If I remember correctly from years ago

No I don't have any personal research related to this field of science. It has been known for a while by the mycology community, and you can easily find any research you desire by looking deeper into the viability of its function by various institutes

A hybridized system of recycling the plastic and turning some into food is a good way to balance it out. There is plenty of money for investors to dish out inventions related to home recycling or commercial facilities specifically for the mushrooms, plus the added profit of selling various mushrooms on different supply chains. Overall, there is no one solution, just a bunch of good ideas.

Oyster mushrooms and many others successfully biodegrade plastics into edible nutrition, and sequester unwanted pollution in the atmosphere into their mycelial network. Underwater mushrooms found in Oregon.

https://www.colorado.edu/ecenter/2021/11/04/plastic-eating-mushrooms#:~:text=Researchers%20have%20now%20found%20that,an%20at%2Dhome%20recycling%20system.

https://fishbio.com/mushrooms-underwater/