Indoor air quality can be dramatically worse than outdoor air quality if proper ventilation is not maintained, resulting in a ...................... effect that creates in-building air pollution levels two to fi ve times greater than that of outdoor air.

Harmful older building materials, including ......... paint and asbestos are indoor air pollutants.

Harmful older building materials, including lead paint and asbestos (a .......... compound) are indoor air pollutants.

The shampoo has a light ............ of herb and plant extracts.

Similarly, radon, a naturally occurring hazardous radioactive gas that must be tested in homes, is chemically classifi ed as a .............

When you breathe out, you ............ air from your lungs.

When one airline reduces its ticket prices, the rest usually ................

Because immigrants do jobs that many people do not want to do, they play a .............. role in the economy.

The present study .............. the findings of many earlier studies of risk factors for sporadic campylobacter infections in other countries.

He soon demonstrated his .......... for criminal action when he was caught stealing money from his employer.

The drugs did nothing to ......... her pain/suffering.

They found that children with language ............ made more errors during the production of verb particles than for prepositions.

It's a classic case of the bored-housewife ................ - she has nothing to do all day except eat and go shopping.

Fuel .......... produces energy to run machines.

..........could be classifi ed according to their pathogenicity—their likelihood of causing disease

..........................(VOCs) is the broadest category among indoor pollutants.

Biological pollutants could be classifi ed according to their ..............—their likelihood of causing disease.

Smoking can cause ...................... diseases.

................. and asthma aggravation are also precipitated by exposure to cigarette smoke.

I do have a ............ memory of meeting her many years ago.

Although she's recovering from her illness, her............of progress is quite slow.

This incident has ............. relations between the two countries.

Getting a lot of sleep and drinking plenty of fluids can ............. the effects of the flu.