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