Which statements describe global warming? Select two answer choices. Global warming can be decreased through deforestation. Global warming occurs naturally. Global warming results from the buildup of nutrients in runoff. Global warming is likely increased by humans. Global warming is enhanced by nonnative species.
The Correct Answer and Explanation is:
Correct answer choices:
- Global warming occurs naturally.
- Global warming is likely increased by humans.
Explanation:
Global warming refers to the long-term rise in Earth’s average surface temperature. This phenomenon can occur naturally due to various factors such as volcanic eruptions, changes in solar radiation, and natural fluctuations in greenhouse gas concentrations. For example, past warming events have been linked to changes in Earth’s orbit or natural cycles such as the Milankovitch cycles. These natural processes can influence climate patterns over thousands or even millions of years.
However, scientific evidence strongly supports the idea that recent global warming trends are largely driven by human activities. The primary contributor is the burning of fossil fuels such as coal, oil, and natural gas. This process releases large amounts of carbon dioxide and other greenhouse gases into the atmosphere. These gases trap heat and lead to a gradual warming of the planet. Additional human activities such as deforestation, industrial processes, and intensive agriculture also contribute to the rise in greenhouse gas concentrations.
On the other hand, deforestation generally worsens global warming by reducing the number of trees that absorb carbon dioxide. Thus, the statement suggesting that global warming can be decreased through deforestation is incorrect. Similarly, the buildup of nutrients in runoff may cause issues like water pollution and algal blooms, but it is not a direct cause of global warming. Nonnative species may disrupt ecosystems but do not significantly influence atmospheric temperatures on a global scale.
Understanding the natural and human-induced causes of global warming is essential for forming effective environmental policies and strategies. Accurate information is critical to addressing climate change challenges and promoting sustainability.
