Oxygen (O2) is not a greenhouse gas because it does not absorb and trap heat in the atmosphere.

Human activities, particularly the burning of fossil fuels, are the primary cause of climate change.

Natural gas is a fossil fuel and is not a renewable energy source.

Global warming refers to the long-term increase in the Earth's average temperature due to the accumulation of greenhouse gases in the atmosphere.

Climate change can have both positive and negative impacts. While it can lead to increased agricultural productivity in some regions, it can also have negative consequences such as rising sea levels and more frequent and intense storms.

Climate change mitigation refers to actions taken to reduce greenhouse gas emissions and limit the effects of climate change.

Driving more is not a climate change mitigation strategy because it increases greenhouse gas emissions.

Climate change adaptation refers to actions taken to reduce the vulnerability of human and natural systems to the impacts of climate change.

Increasing the use of air conditioning is not a climate change adaptation strategy because it can contribute to greenhouse gas emissions.

Carbon capture and storage (CCS) refers to the process of capturing carbon dioxide from the atmosphere or from industrial sources and storing it underground.

Fracking is not a carbon capture and storage technology.

Geoengineering refers to the intentional modification of the Earth's climate system to counteract the effects of climate change.

Nuclear power is not a geoengineering technique.

Energy efficiency refers to the process of reducing the amount of energy used by a system without compromising its performance.

Using renewable energy sources is not an energy efficiency measure.