Statement 1: Carbon dioxide is one of the main constituent of greenhouse gases.Statement 2: In pregnant women increased CO level induce premature birth, spontaneous abortions and deformed babies.

(1)Greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons (CFCs). The absorbed energy warms the atmosphere and the surface of the Earth.(2)Carbon monoxide  exposure during pregnancy can cause severe damage, including intrauterine hypoxia, serious neurological damage, and even fetal death. CO dissolved in maternal plasma crosses the placenta by passive diffusion and thus combines with fetal hemoglobin.