Fill In the Blanks
Instruction:
In the text below some words are missing. Drag words from the box below to the appropriate place in the text. To undo an answer choice, drag the word back to the box below the text.
Haze
One of the most basic forms of air pollution - haze - visibility in many American cities and scenic areas. Haze is caused when sunlight tiny pollution particles in the air, which reduce the clarity and color of what we see, especially during humid conditions. Since 1988 the federal government has been visibility in national parks and wilderness areas, for example, in the Great Smoky Mountains National Park. In 1999, EPA a major effort to improve air quality in national parks and wilderness areas.
A
0/0
AnswersDiscussion
Frequency:
Source:
Order: