No one has yet to prove that man made global climate change is real or a danger to fear...everyday that goes by more and more people are realizing that....if you want to control animals you must frighten them...and that is all this shit is...a mechanism for the control of a population to replace religion...
I think the deterrent is more of a factor. A few months ago, people would cross into Mexico, get rides to the US border, flood our detainment centers so they could not function properly, and then cry they were being mistreated.
Now that Mexico is doing their part to stop them from entering their country, and if the US has a near impassible border structure, and you are not applicable for asylum even if you do get here. What's the point of even trying? Your chances of success are 5% at best. A year ago, your chances at getting into this country was over 80%
So Trump is doing an incredible job for our country. He's solving a problem that's decades old.