San francisco, california has a population of about 80,000 and has a land area of about 47 square miles. houston, texas has 2.1 million people in an area of about 579 square miles. which city is more crowded?

The energy needs of a human population are not affected by

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid