1. The environment can become cleaner and healthier if we learn to behave ourselves - not to trash into the forests, stop uncontrolled felling, organize the recycling system, try to stop pollution. 2. One can make his city cleaner and more beautiful only by following some rules - not to throw the trash out into the streets, not to cut flowers, not to crash benches in parks and so on. 2.Old plastic bottles can be easily a lamp. You need just scissors, some decoration elements and a bulb. You cut the neck of the bottle and then you can cut some strips across the bottle, then decorate it and attach a bulb. A nice hand-made lamp is ready!