Which is an effect of global warming?

A. increasing carbon dioxide in the atmosphere

B. increasing greenhouse gas concentration in air

C. rising sea level over a period of time

D. changing seasons every year

All of the options listed are effects of global warming.

I think increasing CO2 is a cause not an effect, same for other greenhouse gases.

I think winter has always changed to spring

Therefore I would pick:

C, rising sea level

Apologies for the confusion. You are correct, increasing carbon dioxide and other greenhouse gases are causes of global warming. The effect of global warming would be rising sea levels over time. Changing seasons every year is a natural occurrence and not directly attributed to global warming. Therefore, option C, rising sea level over a period of time, is the correct answer.

The correct answer is C. rising sea level over a period of time.

To determine the effect of global warming, we need to understand what it is and how it works. Global warming refers to the long-term increase in Earth's average surface temperature, primarily due to human activities, particularly the burning of fossil fuels and deforestation. This leads to an increase in greenhouse gases, such as carbon dioxide (CO2), in the Earth's atmosphere.

Now, let's analyze the given options:

A. increasing carbon dioxide in the atmosphere: This is one of the causes of global warming, as mentioned earlier. However, it is not specifically an effect of global warming.

B. increasing greenhouse gas concentration in air: This is along the right lines. Global warming is caused by the increasing concentration of greenhouse gases, including CO2, in the atmosphere. However, it does not specifically mention any effects caused by this increase.

C. rising sea level over a period of time: This is the correct answer. Global warming leads to the melting of ice caps and glaciers, resulting in the flow of water to the oceans and contributing to rising sea levels.

D. changing seasons every year: Changing seasons are a natural occurrence caused by the Earth's axial tilt and its orbit around the Sun. While global warming can influence weather patterns and lead to changes in the timing and intensity of seasons, it does not cause the seasons to occur every year.

In conclusion, the effect of global warming from the given options is the rising sea level over a period of time (option C).