10Use the words below to complete the sentences: air purification

Americans spend up to 90% of their time indoors, and in 90% of U.S. offices the number one1)_____ is lack of outdoor air. The EPA estimates that poor indoor air quality results in $60 billion per year in 2)_____expenses. But indoor air quality can be improved by using materials that emit few or no toxins and volatile organic compounds (VOCs), resist 3)_____thereby inhibiting the growth of biological like mold, and adding systems, equipment and products that identify indoor air 4)_____or enhance air quality.

Nanotechnology is contributing to indoor air quality on all of these fronts. Samsung Electronics, for example, has 5)_____ its new Nano e-HEPA (for electric High Efficiency Particulate Arrest) filtration system. The system sifts the air to filter particles, 6)_____ undesirable odors, and kill 7)_____ health threats. It uses a metal 8)_____filter that has been coated with 8-nanometer silver particles. The Kitasato research center of environmental sciences in Japan found the nanofilter killed 99.7% of 9 _____viruses. Up to 98% of odors were eliminated, and another 10)_____eliminated all noxious VOC fumes from paint, varnishes and adhesives.

moisture, launched, airborne, complaint, nanofilter, influenza, dust, medical, eliminate, pollutants

11 Fill in the gaps in the following passage with a suitable preposition given below: water purification

Water is the source of all life 1)_____ Earth, and yet 1.3 billion people do not have access 2)_____ safe drinking water. Furthermore, water is implicated 3)_____ 80 percent of all sickness and disease 4)_____ the World Health Organization. And less than 1 percent 5) _____ the world’s drinking water is actually fit 6)_____ drinking. If the world’s water were compressed 7)_____ a single gallon, only 4 ounces would be fresh. Of that, only two drops would be easily accessible, and only one would be suitable 8)_____ human use.

Researchers 9)_____ Queensland University of Technology use titanium nanoparticles to create an environmentally-friendly water purification system 10)_____ twice the efficiency of current materials (Figure 12.5.).

Figure12.5 Water Purification System at Queensland University of Technology

according to at for(x2) in into of on to with

12 Translate into Russian without a dictionary:

Leadership in Energy and Environmental Design (LEED) consists of a suite of rating systems for the design, construction and operation of high performance green buildings, homes and neighborhoods.

Developed by the U.S. Green Building Council (USGBC), and spearheaded by LEED founding chairman Robert K. Watson, LEED is intended to provide building owners and operators a concise framework for identifying and implementing practical and measurable green building design, construction, operations and maintenance solutions.

Since its inception in 1998, the U.S. Green Building Council has grown to encompass more than 7,000 projects in the United States and 30 countries covering over 1.501 billion square feet (140 km²) of development area. The hallmark of LEED is that it is an open and transparent process where the technical criteria proposed by USGBC members are publicly reviewed for approval by the almost 20,000 member organizations that currently constitute the USGBC.

The Green Building Certification Institute (GBCI) was established by USGBC to provide a series of exams to allow individuals to become accredited for their knowledge of the LEED rating system. This is recognized through either the LEED Accredited Professional (LEED AP) or LEED Green Associate(LEED Green Assoc.) designation. GBCI also provides third-party certification for projects pursuing LEED.