If CO2 level increase from the normal level, what will happen?

Explanation

If CO2 level increases than normal as the world warms due to greenhouse gases carbon dioxide included waters heat up and expand, causing sea levels to rise. The researchers found that the natural relationship displays a strong rise in sea level for CO2 increase from 180 to 400 parts per million, peaking at CO2 levels close to present-day values. The increased percentage of carbon-dioxide will cause the greenhouse effect, i.e. it will not allow the hot rays of the sun to escape from the atmosphere after reflection once they enter the earth's atmosphere, thereby increasing the temperature of the earth, ice on mountains will melt and the water level will rise.