Alcohol, tobacco, laundry detergent, dish soap, chocolate... done right, a business in an area such as these can make a lot of money without constantly having to make large capital expenditures the same way a
steel mill might
require.
The major industrial emitters at refineries, cement plants, and
steel mills could be
required (or induced through taxation) to capture their CO2 emissions or to convert part of their processes to run on power cells and clean electricity.
In heavy industy, fossils fuels will always be
required for lime and cement kilns, metal smelters,
steel mills, foundries and metal casting plants, metal cutting and braising torches, all factories that make ceramics (e.g., bricks, tiles, china, glass, etc), all food production, processing and distribution, space and water heating, cooking and baking, BBQ's, manufacture of porcelain - coated metals, harvesting of wood and lumber manufacture, isolation of essential oils by steam distillation for prepartion of fine fragrances flavors, etc because the fuels provide HIGH HEAT.