An Approach to the Determinants of the Agricultural Output Dynamics in the USA - The Agricultural Economics of the 21st Century - page 6

United States Fossil fuel energy consumpon (% of total)
98
96
94
92
90
88
86
84
82
80
78
76
Fig. 2.4 Fossil fuel energy consumption (% of total) in the USA
United States CO2 emissions (metric tons per capita)
25
20
15
10
5
0
Fig. 2.5 CO 2 emissions (metric tons per capita) in the USA
United States Agricultural methane
emissions (% of total)
40
35
30
25
20
15
10
5
0
Fig. 2.6 Agricultural methane emissions (% of total) in the USA
(Fig. 2.11 ) return in 2009, 2010, 2011, and 2012 to the values of the beginning of
the 1960s at about 4 %.
The central government debt in percentage of the GDP increased drastically
from about 30 % in 2001 to 80 % in 2011 (Fig. 2.12 ). In reality, the financial crisis