CS Executive and Professional Result June 2015 aane par ak students kaise react kerta hai.
SNAP Regulations. The U.S. Environmental Protection Agency's (EPA) Significant New Alternatives Policy (SNAP) program implements section 612 of the amended Clean Air Act of 1990, which requires EPA to evaluate substitutes for the ozone-depleting substances to reduce overall risk to human health and the environment.
Tier 4 refers to a set of emissions requirements established by the EPA to reduce emissions of particulate matter (PM), oxides of nitrogen (NOx) and other harmful toxins from new, non-road diesel engines. As part of this clean-air initiative, the EPA established acceptable levels of emissions in diesel engines.