Refuse to buy their shoddy goods. Give up the ambition of living like a Texan millionaire. Work, always, for a decentralist economy. Support local traders and producers - try to get what you need from as near your home as you can. We must withhold our work, our custom, and our investment from plundering industry.
Road transport is the most destructive thing of all.
If you live in a city, you do not need a car. If you live in the country, you may need one - use it as little as possible. Boycott most goods brought from far away. Take some trouble to find locally produced goods and buy them. Heavy road transport is enormously polluting.