4. Which of the following is the best solution to meet energy demands while protecting the environment?
A. grow more corn to produce ethanol
B. build more nuclear power plants
C. find and burn new sources of oil and coal
D. improve energy efficiency and reduce energy waste

Ameadow ecosystem includes many species of grasses and small shrubs, several herbivores, and a few carnivores. a fungus colonizes the meadow and kills most of its vegetation. what is most likely to happen to the populations of herbivores and carnivores in the ecosystem? a. the populations of herbivores and carnivores will increase because there will be less competition for chemical energy. b. the populations of herbivores and carnivores will remain stable because the fungus cannot infect these organisms. c. the populations of herbivores will decrease because of vegetation loss, but the population of carnivores will remain stable. d. the populations of herbivores and carnivores will decline because less chemical energy will be stored in the ecosystem.

Describe how an electric generator works

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?