What have been some of the significant achievements of the Clean Air Act?
What will be an ideal response?
Significant reductions in atmospheric pollution, direct economic benefits, has saved lives, etc.
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How do seismologists know the outer core is liquid?
A) P-waves are refracted upon arrival in the outer core B) S-waves are absorbed upon arrival in the outer core C) both S-waves and P-waves speed up in the outer core D) both S-waves and P-waves slow down in the outer core
Which of the following is an action local people in Ache, Indonesia, have taken to help reduce the impact of a future tsunami?
A) Plant mangroves B) Construct jetties C) Remove barrier islands D) Drain coastal wetlands
Freezing nuclei are a part of the ________________ process
Fill in the blank(s) with correct word
Latitudes all converge at the poles
Indicate whether the statement is true or false.