In order to answer that question it is necessary to know how much carbon dioxide there is on Venus and how much is in the whole universe. Whereas the former can be estimated, there is little hope of estimating the latter to any degree of accuracy. However, based on the estimated number of galaxy clusters, and galaxies within those clusters, and stars within those galaxies with planetary systems, it is likely that the percentage of universal carbon dioxide that is on Venus is as close to 0% as makes no difference.
Carbon dioxide levels in the atmosphere in 2000 were around 370 ppm (parts per million). They are now (2013) approaching 400 ppm.
Carbon dioxide Carbon monoxide Acetylene Azide
carbon dioxide+water>glucose+oxygoen
0.5-1.5 percentage.
Carbon Dioxide and Carbon Monoxide
Venus has 96 percent of carbon dioxide
Venus has the thickest carbon dioxide atmosphere.
Mars and Venus are both planets that have atmospheres composed mostly of carbon dioxide.
The planet Venus has nitrogen, carbon dioxide and smaller amounts of other gases. Most of the gas is carbon dioxide.
Venus is made up of 95% Carbon Dioxide.
Venus
carbon dioxide
Mars has an atmosphere of about 95.72% carbon dioxide. Venus has an atmosphere of about 96.5% carbon dioxide
Carbon Dioxide. There is considerable sulphuric acid in Venus's atmosphere, too, but it is predominately Carbon Dioxide.
venus because it has 96.5% of carbon dioxide and Earth has 0.03% of carbon dioxide.
venus atmosphere of carbon dioxide is 96.5%
There are two such planets, Mars and Venus. Venus has a much thicker atmosphere than Mars, but both atmospheres are about 95% carbon dioxide.