People make localized decisions which in aggregate have globalized impact. Buying and burning $3 of gasoline is a very affordable decision for a person but it causes problems when everyone does it. We need to make everything that can lead to global warming super expensive, even at the cost of comforts of life. Gasoline, meat, air conditioning, refrigeration all need to be dialed down. Do we have the will power and self control to make these sacrifices? Your first sentence is the answer.