If gases turn into liquids under pressure, what does carbon dioxide turn into? Since there is no liquid state of carbon dioxide, what will carbon dioxide turn into when exposed to high pressure?
There is a liquid state for carbon dioxide. Borrowing the $\ce{CO2}$ phase diagram from Wikipedia, we can see that $\ce{CO2}$ will condense at a few atmospheres, dependent on temperature. At still higher pressures, the liquid will solidify. Below the triple point temperature, the gas will transition directly to solid.