2 Read and complete the sentences with the words. life, needs, ecosystem, changed, future, invented, technology, sourcesHuman environment is a man-made en-invented new technologies. Communicationvironment. It was (1) ... by humans for their became easier and fast across the worldneeds. Before (2)appeared, humans They formed a man-made (5)lived in the natural environment. They hadWe need a balance between the naturalan environment-friendly life. With time, their and man-made environment. If we use the(3 grew and grew. Humans learnt new natural (6) wisely, we can have a heal-ways to change their environment for their thy balance. We should use our resourcesneeds.wisely and learn to save them. Natural re-They learnt to grow crops and animals, and sources like wood, minerals, water and airbuild houses. They (4) ... the wheel, money, are important for (7) If we do not usetrade and business. Transportation became them wisely, we may run out of them onefaster. It became possible after they had day. We should think about our (8)​