Complete the sentences in these paragraphs describing the challenge of providing safe drinking water in different areas.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

The softest and hardest minerals are: softest hardest

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.