Places with more vegetation are generally thought to be less polluted, and the presence of vegetation, itself, can help keep air cleaner.
Biodiesel is a powerful alternative fuel that is less polluting and problematic to produce and implement.
There is little that is less polluting and less harmful to the planet than hunting wild game responsibly.
Energy efficiency ties together several of the IEA's climate change mitigation recommendations to transform our energy economy in ways that are less polluting and advance clean technological innovations.
In supporting greater ambition by nations, religious and faith groups can assist is shaping a world that is less polluted and damaged and healthier, safer and more secure for every man, woman and child.
He also points out that while shale gas may be less polluting than coal and oil, it is still a fossil fuel.
Altering the fuel to be less polluting, preventing outflow during shipping and harbourage, and improving monitoring to reduce emissions need not be costly and will be invaluable in the fight against marine and air pollution as well as climate change.
But environmentalists have a more fundamental reason to be wary of the rise of shale - it may be less polluting than coal, but it is far more polluting than renewables such as wind and solar.
Back in the late-70's ethanol produced from corn was promoted as the perfect answer to the energy crisis: it was renewable, it was domestic, and it was supposed to be less polluting.
Several other attempts to develop genetically engineered animals for consumption, like a pig whose manure would be less polluting, have fallen by the wayside.
