Humans Affect Environment Crossword Puzzle

QUESTIONS LIST: endangered : a species that is in threat of extinction, farming : growing crops and raising livestock, pollution : the introduction of harmful substances or products into the environment:, habitat : an ecosystem or natural environment where animals live, economy : the exchange of resources and money, navigation : directing the course of a ship, aircraft, or guided missile, industry : trade or manufacture of products, highway systems : a network of roads connecting cities and countryside, native species : species that live in a region naturally, population : the number of people in a specific region, volcano : a vent in the earth's crust through which lava, steam, ashes are expelled, ecosystem : the interaction of a community of organisms with their environment, transportation : a way to move people and goods from place to place, dredging : machinery digs up sediment to open up navigation channels in the great lakes, irrigation : to move water to areas where it is needed through pipes, canals, and sprays, invasive species : when species are brought into an ecosystem where they do not naturally live