1. Environmental has increased dramatically over the past decade. (understanding: Para. 1)
2. We are having difficulties in well-qualified staff. (get somebody to join something: Para. 3)
3. There is little we can do to these kids to work hard at school. (stimulate the interest of somebody: Para. 4)
4. Police are anxious to hear any information his whereabouts. (about: Para. 5)
5. The new tax would force companies to energy-saving measures. (take: Para. 5)