Which of the following are causes of indoor air pollution? select all that are true.
a. respiratory disease conversion to more efficient,
b. clean-burning cook stoves purchase of low- or no-voc paints,
c. carpeting, and furniture increased ventilation inefficient indoor cookstoves vocs from paints,
d. carpeting, and furniture people ill from sick-building syndrome
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Ocean waves move up and down in circles, but transmit horizontally toward the shore.
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Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.
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How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey
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Which of the following are causes of indoor air pollution? select all that are true.
a. resp...
a. resp...
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