Combating Climate Change Through Individual Action Act of 2008 - Amends the Internal Revenue Code to allow tax credits for: (1) 30% of carbon sequestration and soil conservation expenditures made by taxpayers engaged in the business of farming; (2) 10% of qualifying planting expenditures, including expenditures for the purchase and planting of any tree, plant, shrub, or bush, and the purchase and installation of a vegetated roof system; (3) the conversion of cropland to pasture for grazing purposes or to grassland or rangeland; and (4) certain types of reforestation and afforestation of land.