As the name implies green technology is the one that has a "green" purpose. Green inventions are (29)..friendly inventions that often involve: energy efficiency, recycling, safety and health concerns, renewable (30).., and more. One of the best known examples of green technology would be the solar cell. A solar cell directly converts the energy in light (31) electrical energy. Another simple invention that can be considered green is the (32). water bottle. Reducing plastic waste is great for the environment. Inventors should know that green inventions and clean technologies are good business. Consumers should know that (33). green inventions can reduce your energy bill and that green inventions are often safer and healthier products. 29. A. environmentally B. environment C. environmental D. environmentalist 30. A. pollution B. question C. resources D. power 31. A. in B. on C. into D. at 32. A. small B. one-time use C. plastic D. reusable 33. A. to buy B. buying C. buy D. bought