mmmmmmmm I'd prefer for trees to not be toxic seeing as the supply oxygen necessary for these plants to grow and for them to grow so quickly it wouldn't make sense that they'd be toxic, but that they'd exert more oxygen than the had prior. In fact, they'd release it in SPADES for the plants to grow so wildly. 

Updated my CS to your nitpicks (not saying that meanly just stating that they are, in fact, nitpicks)

As to Eli's CS...

[youtube]7bJ9qamVPFc[/youtube]

You can probably guess which one I am