What are greenhouse gases?

Greenhouse gases are substances in the atmosphere that have the ability to trap heat, thereby contributing to the greenhouse effect, which is vital for maintaining the Earth's temperature and sustaining life. These gases, such as carbon dioxide, methane, and nitrous oxide, absorb infrared radiation emitted from the Earth's surface and re-radiate it, helping to keep the planet warm.

By efficiently capturing heat, greenhouse gases play a significant role in regulating the Earth's climate. Their presence, particularly in increasing concentrations due to human activities like burning fossil fuels, deforestation, and industrial processes, has been linked to climate change and global warming. This phenomenon is critical in discussions about environmental policy and public awareness of climate impacts.

In contrast, the other options do not accurately describe greenhouse gases; they either suggest effects that are contrary to the established science or limit their impacts to indoor environments, overlooking their crucial role in global climate dynamics. Understanding the function of greenhouse gases is essential for grasping the broader implications of climate change.