True about global warming is-
**Core Concept**
Global warming refers to the long-term rise in Earth's average surface temperature, primarily caused by human activities that release greenhouse gases, such as carbon dioxide and methane, into the atmosphere. This phenomenon is closely linked to climate change, which encompasses a broader range of effects on the environment, including altered precipitation patterns, more frequent natural disasters, and shifts in ecosystems.
**Why the Correct Answer is Right**
The correct answer is related to the fact that global warming is caused by the increased levels of greenhouse gases in the atmosphere. These gases, such as carbon dioxide and methane, trap heat from the sun, leading to a rise in Earth's average surface temperature. The primary human activity responsible for this increase is the burning of fossil fuels, such as coal, oil, and natural gas, which releases carbon dioxide into the atmosphere. Additionally, deforestation and land-use changes also contribute to the increase in greenhouse gases.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the primary cause of global warming. While natural factors, such as volcanic eruptions and changes in Earth's orbit, can influence global temperatures, they are not the primary drivers of the current warming trend.
**Option B:** This option is incorrect because it implies that global warming is a short-term phenomenon. In reality, global warming is a long-term process that has been ongoing for centuries, but has accelerated in recent decades due to human activities.
**Option C:** This option is incorrect because it does not accurately describe the relationship between global warming and climate change. While global warming is a key component of climate change, the two terms are not identical, and climate change encompasses a broader range of effects on the environment.
**Clinical Pearl / High-Yield Fact**
One important aspect of global warming is its impact on human health. Warmer temperatures can lead to increased heat stress, respiratory problems, and the spread of disease-carrying insects, such as mosquitoes and ticks. Additionally, climate change can also exacerbate mental health issues, such as anxiety and depression.
**Correct Answer:**