Carbon dioxide levels have not fallen. They have been gradually increasing for the past 250 years when man began burning fossil fuels and cutting down trees. Since 1980 CO2 levels have increased more rapidly than ever before.
levels of oxygen and carbon dioxide would decrease and levels of carbon dioxide would increase.
the earth is much hotter like 100%
Carbon dioxide (and other gases) creates a "blanket" around the earth trapping heat in the atmosphere. If these "greenhouse" gases were not there some of the heat would escape from the earth's atmosphere --------------------------------------------------------------------------------------- Carbon dioxide is transparent to visible light but opaque to infrared light (i.e. heat). When sunlight passes through the atmosphere and heats the surface of the earth the earth radiates infrared light. At low levels of carbon dioxide most of this infrared escapes to space, cooling the earth; but at high levels of carbon dioxide most of this infrared is reflected back down to the surface of the earth, keeping it hot.
Earth's atmosphere is actually composed of about 0.038% carbon dioxide.
By reducing its emission by factories and by permanent reforestation all over the world.
The carbon Dioxide levels in the Earth's atmosphere are rising.
levels of oxygen and carbon dioxide would decrease and levels of carbon dioxide would increase.
The warming of the earth due to increased levels of carbon dioxide is called the Greenhouse effect. Global warming is a result of the greenhouse effect.
Carbon Dioxide
Earth, Mars and venus all have nitrogen and Carbon dioxide in their atmosphere, though the levels vary from planet to planet.
the earth is much hotter like 100%
Because there were no plant life forms on the Earth when it was first created.
Because sedimentary rocks are formed from tiny animals which have died and fallen to the sea bed millions of years ago. Due to more substances falling onto the sea bed above the animals, they are pressurized underground. Due to the heat of Earth's core, the animals are burnt under the ground, turning into fossil fuels.These animals contain carbon dioxide, and reduce the levels from the atmosphere by dying and travelling underground. This is how sedimentary rocks are a reason for reduced levels of carbon dioxide in the modern atmosphere.Other reasons are that the carbon dioxide dissolved into oceans which were formed millions of years ago. Also, the formation of plants reduced the carbon dioxide levels due to photosynthesis, as they intake it and do not replace it, as they produce oxygen and glucose as a result of photosynthesis.
Carbon dioxide is a greenhouse gas. Greenhouse gases capture and retain the sun's heat. Increased carbon dioxide levels mean that more and more of this heat is retained. This is warming the earth and the atmosphere all round the world - global warming.
Carbon dioxide (and other gases) creates a "blanket" around the earth trapping heat in the atmosphere. If these "greenhouse" gases were not there some of the heat would escape from the earth's atmosphere --------------------------------------------------------------------------------------- Carbon dioxide is transparent to visible light but opaque to infrared light (i.e. heat). When sunlight passes through the atmosphere and heats the surface of the earth the earth radiates infrared light. At low levels of carbon dioxide most of this infrared escapes to space, cooling the earth; but at high levels of carbon dioxide most of this infrared is reflected back down to the surface of the earth, keeping it hot.
The fossil evidence shows that the Earth's climate before had high levels of carbon dioxide. The plants that evolved consumed this carbon dioxide out of the air and formed oxygen, coal, limestone, and other fuels.
Carbon Dioxide do exist in universe in places other than Earth.