Human activities, particularly the burning of fossil fuels, are the primary cause of global warming. These activities release greenhouse gases into the atmosphere, which trap heat and cause the Earth's temperature to rise.

Water vapor is the most abundant greenhouse gas in the atmosphere. However, it is a natural component of the Earth's climate system and does not contribute significantly to global warming.

The burning of fossil fuels releases carbon dioxide, a greenhouse gas, into the atmosphere. Carbon dioxide traps heat and causes the Earth's temperature to rise.

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

Increased agricultural productivity is not a consequence of global warming. In fact, global warming is expected to have negative impacts on agriculture, such as reduced crop yields and increased pest infestations.

A positive feedback loop is a process that amplifies itself. In the case of global warming, the melting of ice and snow exposes more dark surfaces, which absorb more heat and cause further melting.

Improved air quality is not a potential impact of global warming. In fact, global warming is expected to lead to decreased air quality, due to increased levels of air pollution.

Climate change mitigation refers to the process of reducing greenhouse gas emissions and mitigating the effects of global warming.

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

The Paris Agreement is an international agreement that aims to reduce greenhouse gas emissions and limit global warming to well below 2 degrees Celsius.

Increasing the use of coal-fired power plants is not a potential strategy for reducing greenhouse gas emissions. Coal-fired power plants emit large amounts of carbon dioxide, a greenhouse gas.

Carbon capture and storage (CCS) is the process of removing carbon dioxide from the atmosphere and storing it underground.

Improved water quality is not a potential consequence of global warming. In fact, global warming is expected to lead to decreased water quality, due to increased pollution and changes in precipitation patterns.

Climate change adaptation refers to the process of adapting to the impacts of global warming.

Ignoring the impacts of global warming is not a potential strategy for adapting to the impacts of global warming. It is important to take action to adapt to the impacts of global warming in order to reduce the risks and costs associated with climate change.