Water is vital to life and although more than two-thirds of the planet is covered by it, both the quality & availability of this natural resource is critical. Water scarcity arises when the supply of fresh water is overused, polluted, or affected.
Water is vital to life and although more than two-thirds of the planet is covered by it, both the quality & availability of this natural resource is critical. Water scarcity arises when the supply of fresh water is overused, polluted, or affected.
General Note
Teacher's guide available under Additional info tag.
Content Note
1 videodisc, 1 teacher's guide ; Special features: Discussion questions and activities, chapter select. Optional English and Spanish language tracks.
