Okay so maybe I’m being overly simplistic..

It does make sense to me, even from my few small posts here.  The way in which plants interact with each other, the soil, the air and so on (even in just in my favourite little patch of forest alone) is far more highly complex and essentially networked than most of us appreciate.
Another part of the same article states

Plants are actually powerful change agents on the planet’s surface. They pump water from the ground through their tissues to the air, and they move carbon in the opposite direction, from air to tissue to ground. All the while, leaves split water, harvest and manipulate solar energy, and stitch together hydrogen, oxygen, and carbon to produce sugars and starches—the sources of virtually all food for Earth’s life.

before continuing into quite staggering facts about just how much water is actually moved around by the world’s vegetation.  I recommend it as a read, it also had some interesting details about modeling the very strange and profound effects that come about in planet wide climate by an increases in forestry in the Arctic and in changing temperate North America, Europe, and Asia into forest.
And in a study published in May, she investigated how U.S. forest die-offs would affect forests elsewhere in the country. In her models, she killed off forests in 13 heavily forested regions that the National Science Foundation has identified as being ecologically distinct. The results were dramatic. When she wiped out trees in the Pacific Southwest, forests in the Midwest and eastern United States suffered. In recent years, the Pacific Southwest has, in fact, lost an estimated 100 million trees, mostly to droughts and voracious insects.
So my first lesson – it might not just be about planting trees, it could be important where the trees are planted.  There is a reason why the Brazilian Rain forest is important as it is and in that precise location.   This really, really shouldn’t surprise me, because having studied environmental history in the Classical period a little, I can say even then writers like Theophrastus and Pliny were commenting on environmental changes (like deforestation or the drying out of a marsh) as having had consequences for the climate and water supply of areas they were writing about.    Classical Environmental History is *enormously* interesting, just saying, but it does rather sharply remind me of Mr. Victor Connerty, in the course of his amazing Roman History lectures, often quoting “Those who can not learn from history are doomed to repeat it.”

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