Scientists have concluded that human activities are affecting the atmosphere and causing rapid climate change on a global scale. which statement provides the strongest evidence that these changes to global climate are not the result of natural causes, such as variations in earth's orbit?

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.