Sentence examples for pollutants drop from inspiring English sources

Furthermore, previous investigations have shown that concentrations of traffic-related air pollutants drop off to the local background concentration between 100 and 150 m from the roadside (Roorda-Knape et al. 1998), indicating that a 100-m buffer is a reasonable size to capture local traffic-related air pollution.

In the last two decades, emissions of six common pollutants dropped 41percentt.

Between 1980 and 2012 total emissions of six common air pollutants in America dropped by 67%, according to the Environmental Protection Agency EPAA).

"Instead, ministers are championing weak emissions standards for cars and trying to get major air pollutants from agriculture dropped from European laws".

"Dropping pollutants into a reach of streams for 30 years was a hard thing for most people to swallow," Lea says.

This can be used to determine an optimal configuration for the gas liquid contactor taking into account constraints such as pollutant solubility, pressure drop or compactness.

Eighteen of the 25 US cities with the worst particulate pollution saw a drop in year-round particle pollutants because of cuts in emissions for coal-fired power plants and other measures.

The flame stability, flame temperature profile, flame temperature, pressure drop, and pollutant emission of these four materials were investigated.

To better understand the flow behavior by using numerical simulation is important for optimization and scaling-up of design, in order to increase the combustion efficiency and separation efficiency, reduce the pressure drop and pollutant formation, and stabilize the flame.

According to the EPA, from 1970 to 2005, total emissions of the six principal air pollutants, including PM's, dropped by 53% in the US.

Using design inlet flow of 50 L/d with two times and four times higher grey water pollutant quantity, the COD values drop to zero after the initial stage (that has a retention time measurable in minutes).