No, not all greenhouse gases need to be polar to contribute to global warming. While polar molecules such as water vapor, carbon dioxide, and methane are major contributors to the greenhouse effect, non-polar molecules like ozone and nitrous oxide also play a role in trapping heat in the Earth's atmosphere.
Polar molecules have a dipole moment, which means that one end of the molecule has a slight positive charge and the other end has a slight negative charge. This allows them to interact with other polar molecules and absorb and emit infrared radiation, which is the main way that the Earth's atmosphere traps heat.
Yes, non-polar greenhouse gases can still contribute to climate change. While they may not be as effective at trapping heat as polar molecules, they can still absorb and emit some infrared radiation, contributing to the overall warming of the Earth's atmosphere.
No, greenhouse gases are not the only factor causing global warming. Other factors such as deforestation, changes in land use, and human activities like burning fossil fuels also contribute to the increase in the Earth's average temperature.
Yes, greenhouse gases play an important role in regulating the Earth's temperature and making it habitable for life. Without them, the Earth would be too cold to sustain life. However, an excess of greenhouse gases and the resulting increase in temperature can have negative impacts on the environment and human health.