A guerrilla gardener installed a pop-up wetland in the LA River. Here's how — and why

Easier to get forgiveness than permission

I can't comment on the legitimacy of the concerns about his actions impacting ecology or flood control - although I suspect they are overstated if not outright nonsense - but crikey that concrete LA river looks terrible, please anything to make it nicer.

I love this idea so much. I wonder how I can bring about this level of 'minimalist' change without having any waterways like that to work with.