More CO2 is needed to bolster plant life, which turns the gas into oxygen while also providing food. Temperatures over time have fluctuated while CO2 levels have remained steady. What’s more, temperature increases have historically led increases in CO2 levels. Many, many reputable scientists believe that natural factors overpower the current influence of CO2 on global warming. CO2 is a great airborne fertilizer, which, as its concentrations rise, causes additional plant growth and causes plants to need less water. The warning level of CO2 in submarines isn’t reached until the atmosphere has 8,000 parts per million of CO2.” Humans have been fertilizing Earth’s greenery worldwide, but not with nitrogen-based fertilizer that runs into the rivers and oceans with very negative effects. We have been raising the level of CO2, which has no negative effect on any plant or animal life.