Congenital anomalies are also known as birth defects, congenital disorders or congenital malformations. Congenital anomalies can be defined as structural or functional anomalies (e.g. metabolic disorders) that occur during intrauterine life and can be identified prenatally, at birth or later in life.
But unlike in 2012 when Wyoming was home to nine of the US' ten biggest coal mines, the Cowboy State had a bit more competition last year. North Dakota's Freedom mine has taken the spot of the US' tenth biggest coal producer, as Wyoming's Caballo slid off the top-ten chart. All production figures are in metric tonnes.
The reserve list specifies different types of coal and includes countries with at least 0.1% share of estimated world coal reserves. The production list includes countries with coal production close to or larger than 1 million tonnes.n 2011 total coal production was 7,783 Mt. Top coal producers in 2012 were (Mt): China 3,549, United States 935, India 595, Indonesia 443, Australia 421, Russia 354, South Africa 259, Germany 197, Poland 144 and Kazakhstan 126.