Warning: This Bulldozer Test Is Addictive and Harder Than It LooksShare:FacebookPinterestTwitterMailHow does a bulldozer reduce emissions under EPA Tier 4?60%Next Correct Incorrect Improved filters in Tier 4 engines trap pollutants, reducing harmful emissions. How does a bulldozer reduce emissions under EPA Tier 4? Improved filters Lower speed Reduced load Quieter engine 60%
