Matching Pairs Humans in Nature VocabularyOnline version Test your knowledge about the relationship between humans and nature with this fun matching pairs game! by Zuzana Birošová 1 reforestation 2 greenhouse gas 3 carbon 4 renewable energy sources 5 pollution 6 recycle 7 wildlife 8 climate change 9 ecosystem 10 environmentalist clean energy that comes from natural sources or processes that are constantly replenished a chemical substance contained in all plants and animals the planting of trees and plants to help a damaged or destroyed forest recover animals, birds, insects, etc. living naturally in the wild a person who protects the natural world and educates others about environmental problems Long-term alteration of temperature and typical weather patterns a gas in the atmosphere that stops heat from escaping into space a community of living organisms and their environment the contamination of the environment, by industrial waste products or chemicals to make something new from materials that have been used before