If _one_ person forgoes buying a new phone, or doesn't fly, or doesn't use a car, it won't make an appreciable difference. If 100 million people do it, it will

If _one_ person forgoes buying a new phone, or doesn't fly, or doesn't use a car, it won't make an appreciable difference. If 100 million people do it, it will. So ... I applaud both of you.