Large commercial vehicles also typically use diesel fuel, which is more fuel efficient than gasoline, but more polluting.
China also wants to use more natural gas and reduce its dependence on coal and oil, which are more polluting.
Others like Mr. Cook, to the dismay of environmentalists, are dusting off old wood-burning devices that are less efficient and more polluting.
The black communities were separated from whites not only by distance, but by as many physical obstacles as possible, the more polluting the better.
The Greens say his concessions break earlier promises to continue to push France toward using rail traffic over more polluting trucks.
Mr. Holloway said the project would make the city's energy supply more reliable and help reduce emissions of soot and heat-trapping greenhouse gases by providing an alternative to more polluting energy sources like oil.
To the Editor: How can it be more polluting to burn wood in an efficient wood stove than to generate the same amount of heat using electricity generated from coal, or oil burned in the house furnace?
Earth construction has a major expression in less developed countries, however, the mimetic temptations towards more polluting construction techniques based on reinforced concrete and fired bricks are likely to favor a change towards a clear unsustainable pattern.
The reason is the huge rise in the use of shale - which accounts for one-third of US gas production and almost a quarter of oil production - at the expense of coal, which is generally considered to be more polluting.
Muhammed Ali Shahin, from YPSA, said he expects the industry to become more agressive, competitive and more polluting in the coming years.
