Why do most economists favor tradable emissions allowances to the command-and-control approach to pollution?

Costs tend to be lower when there are emissions allowances (or credits) for businesses and individuals. This gives those who create more pollution the ability to purchase these credits from companies and groups that use fewer and create less pollution.

You can drink laxative, or  do this exercise when you are sitting in the bathroom on the toilet. to relieve  constipation  fast or in about 1 minute, pinch your nose after your usual exhalation. start holding your breath. but do not mouth breath during this just hold your breath.