Dark clouds of soot and gases spewed by tractors, bulldozers, and backhoes are becoming a thing of the past under new federal standards that have forced cleaner diesel engines this year.

In the wake of trucks and buses already modernized by higher U.S. standards, engines and fuel used by farm and construction equipment are next on America's green agenda. More and more dealers are building their inventory to have equipment like this.

They are producing cleaner emissions: lower-sulfur diesel fuel, particle-trapping filters, and more efficient engines with fuel-injection software, recirculated exhaust systems, or catalysts that prevent pollutants from forming.

(READ the story from Environmental Health News)