Nothing bad will happen! The sun will still shine on my solar panels as it does most days, my plants will still grow, and my chickens will still lay eggs. The price of electricity will rise minimally, but I have been duly compensated by increased government payments.
So rock on July 1st, because like any other apocalyptic prediction in the past, stuff all will occur to you and I. Only good can come from it, however Big polluters will do anything to try and convince you otherwise. After all, it is their bottom line that they are more concerned about, not the fate of humanity.
The same thing political and media bullshit happened when the Goods and Services Tax was introduced. Mayhem? I think not!