For most countries around the world, sourcing energy entirely from wind, solar, geothermal, and hydropower by 2050 would reduce their energy needs and costs, improve air quality, and help slow climate change, according to a study in Environmental Science & Technology.
But you need to cut those trees down and place them somewhere they won’t rot
Sink them to the bottom of the deep ocean, but trees famously float
Leave them in deserts where the dryness will suppress rot, but damage the desert habitat
Dump them in peat bogs, but there aren’t enough
Perhaps it would be best to cook them to charcoal, it releases some carbon into the atmosphere, but it would leave some solid, inedible to anything carbon that can be dumped in any old mine, but that’s expensive
Also if you dump the whole trees in whatever way, you also dump whatever nutrients are in it