Small changes in earth’s orbit and periodic changes in the sun’s energy aren’t enough to have caused significant climate changes in the past.

Gases such as argon, carbon dioxide, water vapour and methane make up a tiny percentage of the air and don’t play an important role in regulating our climate.

The troposphere is a layer of the atmosphere that is closest to the earth’s surface and has a large impact on climate.

The saltwater oceans don’t impact the earth’s climate in a significant way because freshwater is more abundant.

Most of the hydrosphere is composed of freshwater.

The main greenhouse gases—such as carbon dioxide, methane, and water vapour—naturally occur in the atmosphere at very low levels.

The greenhouse effect is a naturally occurring process and is necessary for life on Earth, so it can’t be a problem.

The greenhouse effect occurs because the ultraviolet radiation cannot escape Earth’s atmosphere and warms the planet further.

When the earth absorbs the sun’s radiant energy, it is transformed into heat energy, warming the planet.

It would be better if we could get rid of all carbon dioxide.

Nitrogen and Ozone are greenhouse gases.

Most of our atmosphere consists of nitrogen and oxygen.

The production and burning of fossil fuels like coal and oil are significant contributors to the production of greenhouse gases.