Fill in the Blanks Global Warming Fill in the BlanksOnline version Test your knowledge about global warming by filling in the missing words in this text about the causes, impacts, and solutions of this environmental issue. by Jasmina Sahovic 1 atmosphere carbon dioxide biodiversity Global warming increase greenhouse gases renewable energy sources environment human activities melting ice caps burning of fossil fuels methane negative impacts Earth's average surface temperature weather events deforestation rising sea levels threat reducing greenhouse gas emissions refers to the long - term in due to , such as the and . This increase in temperature is primarily caused by the release of , such as and , into the . Global warming has numerous on the , including , , and more frequent and severe . It also poses a to , as many species struggle to adapt to the changing climate . Mitigating global warming requires and transitioning to .