one of the causes is drout
Those are 21st century technologies.
The 21st century. Think of it this way. The 1st century is years 1-100. So that's 1. For the rest, simply take the first two digits in the year, in this case 20, and add one. So 20 + 1 = 21, the 21st century.
The Steelers won four Super Bowls in the 20th century. They have also won two Super Bowls in the 21st century.
21st Century Breakdown's genius plotline bases around two characters (Christian and Gloria), a couple struggling through the mess George W Bush left behind we he left office.
There are two answers to your question: 1st) The Earth is more than 6000 years old (but that's not important to your question). 2nd) The 21st century refers to the time after the accepted year zero (A.C.E, or after the common era). So right now, we are in the 21st century (21st set of 100-years) after year zero.
21st century breakdown is about two teenagers (Christian and Gloria) that are in love, but also trying to survive modern day generation that our parents have left behind. If you want to know more than what is in this here answer, go to www.greendayauthority.com
The 18th century. Just add one to the first two digits of the year in question. (1750--> 17 +1=18) This century, for instance is the 21st (2010-->20+1=21)-Akilae
the rock opera "21st century breakdown" is about two young lovers named Gloria and Christian.
Yellowstone has a approx. 650,000 year-old cycle, and so the last major eruption was about 650,000 years ago. Therefore, the next eruption is long overdue and a major volcanic eruption is expected to occur in this century. It may be late 21st century (2070+), mid-21st century (2040+) or early 21st century (i.e. now or in the next two decades). Basically, Yellowstone will erupt that is a guarantee. Anyone guessing December 21, 2012?
No interntional police agencies have been created in the 21st Century. The League of Nations and the United Nations were both created in the 20th century, following the two world wars.
There have been two; The lesser known Irish Famine 1740-1741 & The Great Famine 1845-1852.