<span>three most severe downturns in the United States economy since the 1920s were:
- The depression of 1921, happened because we receive a blowback for all the money we spent on world war I
- The Great Depression of 1929-1933 , happened because our investment to expand our business to all over the world
- The Great Recession of 2007, happen because of the mortgage crisis, causing Global financial crisis</span>
As I recall it was rolled-steel girders riveted together, probably from shipbuilding, together with steam-powered winches and an abundance of cheap steel. As opposed to European cathedrals erected with animal-powered winches and with more expensive forged iron bracing (one of the big cathedrals has a kind or iron corset to keep the walls from bursting outwards).
All 13 were needed to pass those.
Answer:
Speak up! ...
Power your home with renewable energy. ...
Weatherize, weatherize, weatherize. ...
Invest in energy-efficient appliances. ...
Reduce water waste. ...
Actually eat the food you buy—and make less of it meat. ...
Buy better bulbs. ...
Pull the plug(s).
