What potent greenhouse gas is produced by the digestive systems of cattle?
Greenhouse gas Greenhouse gas A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Greenhouse gases cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone. Without greenhouse gases, the average temperature of Earth's surface would be about , rather than the present average of . The atmospheres of Venus, Mars and Titan also contain greenhouse gases. Human activities since the beginning of the Industrial Revolution (around 1750) have produced a 40% increase in the atmospheric concentration of carbon dioxide (), from 280 ppm
Greenhouse gas emissions by the United States Greenhouse gas emissions by the United States According to the U.S. Energy Information Industry (EIA), the United States produced 5.14 billion metric tonnes of carbon-dioxide equivalent greenhouse gas (GHG) emissions in 2017, the lowest since the early 1990s. From year to year, emissions rise and fall due to changes in the economy, the price of fuel and other factors. The US Environmental Protection Agency attributed recent decreases to a reduction in emissions from fossil fuel combustion, which was a result of multiple factors including switching from coal to natural gas consumption in the electric power sector; warmer winter conditions that