A) 21st century B) 17th century C) 19th century D) 15th century
A) American Revolution B) French Revolution C) Scientific Revolution D) Industrial Revolution
A) Oxygen B) Helium C) Nitrogen D) Carbon dioxide
A) Amazon rainforest B) Sahara desert C) Arctic D) Antarctica
A) Absorbing heat and carbon dioxide B) Causing cooling of the Earth C) Releasing heat into the atmosphere D) Preventing greenhouse gas emissions
A) Miocene B) Pleistocene C) Holocene D) Anthropocene
A) Nitrous oxide B) Methane C) Sulfur dioxide D) Carbon monoxide
A) Plate tectonics B) Solar radiation C) Volcanic eruptions D) Human activities |