Question

if we look at fossils and rock chemistry, we can learn about ancient climates, even from millions of years ago. what do these data show? earths climate is dynamic, and earth has had warm and cold periods. earth has always been relatively cool, until human - caused climate change. earth has always been stable and relatively warm, but human - caused climate change has increased that warmth. scientists had decided that the fossils are unreliable, and we cant conclude anything about ancient climates.

Explanation:

Fossils and rock chemistry are important sources of information about Earth's past. Earth's climate has never been static. There have been ice - ages (cold periods) and times when the Earth was much warmer than it is now (e.g., during the Cretaceous period). Human - caused climate change is a relatively recent phenomenon. Fossils are reliable sources of information about ancient climates. For example, the presence of coal (formed from plant matter in warm, humid environments) in regions that are now cold indicates past warm periods.

Answer:

Earth's climate is dynamic, and Earth has had warm and cold periods.