Lifestream is that natural spirit energy. Mako is the refined, liquid energy state that's used as fuel for energy in Shinra technology. That state of spirit energy is not natural and eventually destroys it. Mako doesn't pool in natural locations, it's extracted and refined.
As far as I can tell, there is no difference between "mako" and "the Lifestream". At least not by the time the Compilation was created. Multiple keyword entries conflate both the Lifestream and mako with the exact same thing: "spirit energy". Mako *is* what the Lifestream is made of. It's just what Shinra calls the Lifestream as a "raw material". Saying the Lifestream is made out of mako is like saying the ocean is made out of water. And then saying *both* the ocean and water are made out of hydrogen dioxide.
10th Anniversary Ultimania Terminology...
---------------------------------------------------
Mako
『FFVII』『BC』『CC』『DC』
The energy resource pumped up by Shinra from the interior of the Planet using its mako reactors. In addition to being consumed to power everything that makes life convenient, it has also been used as the foundation for the latest military technology, such as the creation of materia and the production of SOLDIERs.
Mako is synonymous with spiritual energy, the energy of existence that makes up the Lifestream. Its overuse will ultimately mean the collapse of the Planet in the not-too-distant future. Therefore, after Shinra was broken up, people are searching for a way of life that does not rely on the convenience of mako.
The Lifestream
『FFVII』『АС』『BC』『CC』『DC』
The vast flow of spiritual energy that a Planet dwells in. Like the bloodstream flows through the human body, it circulates through the Planet and eventually becomes the source of birth for new life. All living things born in this way will ultimately die and return to the Lifestream. When this circulation of energy happens normally, the Planet is cultivated prosperously.
Materia
『FFVII』『АС』『BC』『CC』『DC』
A high-density condensation of mako energy in a solid and stable form. In some cases,
it is formed naturally in places where mako energy is abundant, but most of the time it is artificially manufactured using technology developed by Shinra. Many of them, such as magic materia like "Fire" and "Blizzard", can be combined with weapons to give the user enormous combat power.
Materia is a condensed form of the knowledge remembered by the Planet. Because of this, the longer a materia is used, the stronger the forces are that can be retrieved from its memory.
Mako Poisioning
『FFVII』『BC』『CC』『LO』
The symptoms of the spiritual collapse caused when a living being falls into the Lifestream or is exposed to high concentrations of Mako for an extended period of time.
The Planet's memory, a vast amount of information, is condensed into Mako. If a person continues to be exposed to Mako, a large amount of knowledge will flood the brain beyond its capacity to handle, making it difficult to maintain normal spiritual activity.
Mako Reactor
『FFVII』『BC』『CC』『DC』『LO』
A facility for pumping mako out of the ground. Shinra has been building these facilities at magic-rich sites around the world to monopolize the supply of energy resources. There are many doubts about safety regulations, especially in the case of the reactors built in remote areas, which have been confirmed to be involved in large-scale accidents.
------------------------------------------------------------------------
It's... really obvious that as far as the devs are concerned... mako and Lifestream are the same thing. YMMV on if they characters in the game know that or not (or if they even *want* to know that)...
Did he need Aerith to join wilingly to help make the Mako there more "stable" to mine properly?
Join willingly? No. Want a Cetra to pull up mako from the Planet to make it easier to make into energy? Yes. That was the *entire reason* the Jenova Project was ever made to begin with. President Shinra waned a bunch of Cetra working for him to make creating mako reactors easier.
Things to look for: Was the Midgar Area vibrant before Midgar was built? (This is true for the Nibelheim Mountains, Junon, Corel, etc). I don't think we actually see any area get turned barren despite fan canon/interpretation over the years since OG's release. I think OG ties it to the barren Midgar reason a bit, but as materials have expanded, I don't recall any sign that it was fertile prior to the construction.
It absolutely was. The Midgar Timeline in the Remake Material Files says the Midgar area was a fertile region before Midgar was built there. As the years went by and more and more mako/Lifstream was sucked up... the plants died out and the very ground... seems to have stared becoming less structurally sound. It seems there was some kind of sink-hole/cave-in/collapse of the ground in the slum areas, which is why the slum areas are now... in this kind of canyon under Midgar. So... yeah... using mako means the area starts.. not just becoming more desolate but even the very ground becomes less stable...
It actually is more complicated than this. Even things like shipping in food doesn't work well *because* of the lack of mako in the region. Fresh food can't be stored long term because... *something* happens to it regardless of storage methods. It like... dries/rots/spoils *very* quickly *because* the mako reactors are pulling all the "spirit energy" out of the region... As a result, most food in Midgar is very processed. IE: it doesn't have a lot of whatever the mako reactors are pulling out of the area in it.
Mako does "pool" in... broken... let's say... areas. We see it gathering in Banora in CC after the town is bombed and slowly healing the damaged land there. The plants are also growing like *crazy* in Banora and the entire area/cave system is filled with mako. What was a burned out town (including all the foliage) seven years earlier is a lush orchard with full grown trees that looks... *a lot* further along in it's healing than it should be in just seven years. Granted, there's also not a mako reactor there that's sucking up all the mako in the area. There's also no Cetra directing the Lifestream to go there and fix stuff... the Lifestream just... knows to go there and do it somehow.
A similar thing has been happening at the Northern Crater ever since Jenova's meteor smashed into the land there. If it wasn't, Sephiroth would have no reason to *go* there to absorb all the energy being routed there to heal the land. I'm not saying the Cetra don't *help* with this process... but the Planet *can* do it on it's own. Just probably not as efficiently/quickly.
So the idea the Planet is sending more Lifestream to the Midgar area to try to fix it... only for that Lifestream to get sucked up by the mako reactors... would make a lot of sense. We see good evidence of this in both AC and DC... where not even two years after the reactors go down, there's river going though the wasteland. DC ups this to a full on sea/ocean. Which... we see in the Shinra VR version of the Cetra...
Speaking of which... the biggest piece of propaganda in the Shinra VR show is not the Cetra... it's that the Midgar region was a barren desert before Midgar was built. It *should* have been a grassland like what we find out by Kalm...
Their core invention/investment situations human settlement in the unlivable, barren, struggling ecosystems - life is hard in these regions.
Oh, it's worse! Shinra actually *knew* that the reactors made the land barren *before* they even built Midgar. They just didn't care. In fact, they tired to make it less noticable by *building* the Plate on Midgar so most people wouldn't live on the land and *notice* what
The Midgar Timeline in the Remake Material Ultimania is *fascinating* read really, there's a huge ammount of information in there regarding what the area was like before the reactors started up and what Shinra's logic in making Midgar was.... and it's... *worse* than anyone thought...