Wind is a clean source of renewable energy that produces no air or water pollution. And since the wind is free, operational costs are nearly zero (26) _____ a turbine is erected. Mass production and technology advances are making turbines cheaper, and (27) _____ governments offer tax incentives to spur wind-energy development. Drawbacks include complaints from (28) _____ that wind turbines are ugly and noisy. The slowly rotating blades can also kill birds and bats, but not nearly as many as cars, power lines, and high-rise buildings do. The wind is also variable: If it's not blowing, there's no electricity generated. Nevertheless, the wind energy industry is (29) _____. Thanks to global efforts to combat climate change, such as the Paris Agreement, renewable energy is seeing a boom in growth, in (30) _____ wind energy has led the way. From 2000 to 2015, cumulative wind capacity around the world increased from 17,000 megawatts to more than 430,000 megawatts. In 2015, China also surpassed the EU in the number of installed wind turbines and continues to lead installation efforts.

Music is the universal language of mankind. Scientists at Havard published the most comprehensive scientific study on music as a cultural product, which examined what features of song tend to be shared across societies. The research team found that across societies, music is associated with behaviors such as healing, dance, and love. They discovered that songs that share behavioral functions tend to have similar musical features.
Additionally, music therapy can help to alleviate symptoms associated with career and its treatments. Music can help reduce breathing problems and improve quality of life in patients in all stages of cancer. It has been demonstrated that for patients undergoing radiation therapy simulation, music therapy lowers anxiety and stress. If you ever have an MRI in a closed unit, one of the first questions the technician will ask is if you would like to listen to some music.
Music can be a safe place for people to explore fear, anger, and the range of emotional responses to living with cancer. Just as each patient’s career treatment is individualized, so is each coping strategy. Many strategies involve keeping journal, exercising, finding spiritual support, staying involved in the working environment without pushing oneself too hard, setting aside time to be alone with one’s thought and practicing relaxation techniques. Relaxation can involve listening to music of any genre. And finally, the obvious: You don’t need to be musically talented to do music therapy. It cannot cure, treat or prevent cancer, but it can help you patients to relax and improve their emotional and physical well-being.

Artificial intelligence (AI) and related technologies are increasingly prevalent in business and society; besides, they have been applied to education. These technologies have the potential to transform many aspects of the teaching - learning process.
Basic activities in education like grading can be automated with the help of AI. At educational institutes, marking a large number of tests and assignments is tedious work. Teachers often find that grading takes up a considerable amount of time which can be used to interact with students and prepare for class. AI, at present, may not be able to actually replace human grading; however, it's getting pretty close. Nearly all kinds of multiple choice and fill-in-the blank testing can now be performed by Al- driven machines, and automated grading of student writing may not be far behind. Essay-grading softwares are still in their infancy, yet they will be fully developed over the coming years, allowing teachers to focus more on classroom activities and professional development.
Learners can also get additional support from AI. For instance, tutoring programs based on artificial intelligence already exist to help students with basic courses of mathematics, writing, foreign language, etc. With the rapid pace of technological advancement in recent years, sophisticated tutoring systems which can help students learn high order thinking and stimulate their creativity will not be a pipe dream. Moreover, Al programs can give learners useful feedback and assistance. Some schools, especially those with online courses, are using AI systems to monitor students' progress. These systems not only offer students advice on individual courses but also help students choose majors in accordance with areas where they succeed or struggle.
For better or worse, AI systems have taken place in certain types of classroom activities. In the next decades, their influences will extend significantly, which offers both teacher and students a much wider range of services.