The correct answer is: D. Green House effect
The greenhouse effect is a natural process that warms the Earth’s surface. When the Sun’s energy reaches the Earth’s atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. Greenhouse gases include water vapor, carbon dioxide, methane, nitrous oxide, ozone, and some artificial chemicals such as chlorofluorocarbons (CFCs). The absorbed energy warms the Earth’s atmosphere and surface.
Without the greenhouse effect, the Earth’s average temperature would be about -18°C (0°F), too cold for life as we know it. However, human activities are increasing the amount of greenhouse gases in the atmosphere, which is causing the greenhouse effect to become stronger. This is causing the Earth’s temperature to rise, which is known as global warming.
Global warming is a serious threat to the planet. It is causing the Earth’s ice caps to melt, sea levels to rise, and extreme weather events to become more common. It is also having a negative impact on human health, agriculture, and ecosystems.
There are a number of things that we can do to reduce greenhouse gas emissions and mitigate the effects of global warming. These include:
- Using renewable energy sources such as solar and wind power
- Improving energy efficiency
- Reducing deforestation
- Investing in sustainable agriculture
- Protecting our oceans
We all need to play our part in addressing climate change. By taking action now, we can help to protect our planet for future generations.