A hypothesis that states that the earth is getting much hotter due to the release of large amounts of greenhouse gasses- gasses that trap heat in the earth. It is hypothesized that the earth is getting much hotter due to emissions of greenhouse gasses. This is entirely speculative and is not proven true, nor false.
Global warming is when the earth heats up (the temperature rises). It happens when greenhouse gases (carbon dioxide, water vapor, nitrous oxide, and methane) trap heat and light from the sun in the earth’s atmosphere, which increases the temperature. This hurts many people, animals, and plants. Many cannot take the change, so they die.