1. For each of the following statements, select Yes if it can be reasonably inferred from the given information. Otherwise, select No.In 2010, total U.S. CO2 emissions were approximately 5707.4 Tg. => YesTab 2: Total CO2 emisssions from fossil fuel of US in 2010 is 5387.8
Tab 1: Within the United States, fossil fuel combustion accounted for 94.4% of CO2, emissions in 2010
=> Total US CO2 emissions: \(5387.8 \div 0.944 = 5707.4\)
In 2010, U.S. greenhouse gas emissions, not counting CO2 emissions from fossil fuel combustion for electricity generation, were 4563.3 Tg CO2 Eq. => YesTab 1: Total greenhouse gas emissions: 6821.8
Tab 2: Total US CO2 emisssions from fossil fuel for electricity generation in 2010 is
- Transportation: 4.5
- Industrial: 637.6
- Residential: 843.5
- Commercial: 772.9
- ==> Total: 2258.5
==> U.S. greenhouse gas emissions, not counting CO2 emissions from fossil fuel combustion for electricity generation: 6821.8 - 2258.5 = 4563.3
In 2010, methane emissions in the U.S. were less than 6% of total U.S. greenhouse gas emissions. => NoTab 1:
- The primary greenhouse gas emitted by human activities in the United States was CO2, representing approximately 83.6% of total greenhouse gas emissions
- We do not know the composition of the remaining 17.4% greenhouse gas emission and therefore do not know whether methan emissions were more or less than 6%
2. For each of the following sectors, select > 5.00% if the sector accounted for more than 5.00% of the world’s CO2 emissions in 2010. Otherwise, select < 5.00%.World CO2 emissions in 2010: 30,313
U.S. Transportation sector: \(\frac{1750}{30,313}\) = 0.0577 = 5.77% > 5%
U.S. Residential sector:
- 1183.7 much less than 1750 (Transportation) (only around 2/3).
- Meanwhile, Transportation is just slightly more than 5%
- Residential must be less than 5%
U.S. Commercial sector: Similarly, must also be less than 5%
3, In 2010, CO2 emissions from fossil fuel combustion in the United States accounted for what percent of total greenhouse gas emissions in the United States?Tab 2: CO2 emissions from fossil fuel combustion in the United States in 2010: 5387.8
Tab 1: Total greenhouse gas emissions in the United States in 2010: 6821.8
% = \(\frac{5387.8}{6821.8}\) = 78.9%