For the neogreens, science and business will provide while nature can adapt. It is a messsage gaining traction
A society that takes progress as its religion does not look kindly on despair. If you are expected to believe everything will keep getting better, it can be difficult to admit to believing otherwise. This is doubly true for political activists. If you've devoted your life to fighting for a cause, you will probably feel duty bound to continue supporting it, at least in public, however hopeless it may begin to look.