burning fuels for heat in buildings or cooking in homes.■ ENERGY SUPPLY—the burning of coal, natural gas, and oil for electricity
and heat is the largest single source of global greenhouse gas emissions.
■ INDUSTRY—primarily involves fossil fuels burned on-site at facilities for
energy; cement manufacturing also contributes significant amounts of
CO 2 gas.
■ LAND USE, LAND USE CHANGE, AND FORESTRY—includes deforestation of
old-growth forests (carbon sinks), land clearing for agriculture, strip
mining, fires, and the decay of peat soils.
■ TRANSPORTATION—involves fossil fuels that are burned for road, rail, air,
and marine transportation; almost all (95%) of the world’s transportation
energy comes from petroleum-based fuels, largely gasoline and diesel.
■ WASTE AND WASTEWATER—landfill methane (CH 4 ), wastewater methane
(CH 4 ), and incineration as a method of waste management.Source: U.S. Environmental Protection Agency (EPA)
Figure 11.5 Greenhouse gases by source Greenhouse Gas Emissions by