A false claim on social media states that atmospheric carbon dioxide cannot warm the Earth's surface because "heat only goes up".
Having reached the air, CO2 no longer has any possible heating effect. Have you forgotten what we learned at school, that heat goes UP??
However, experts argue that heat is transferred in all directions, including downwards, via radiation, which is how carbon dioxide (CO2) warms the planet.
AAP FACTCHECK confirms! Author's note: Climate science defies false claims.