EBOOK
About
The oceans, where life first began, occupy more than 70 percent of the Earth's surface. About half of the planet's 7 billion people live in close proximity to an ocean. We depend on them for food, energy, and recreation. Yet we know comparatively little about the oceans. One thing we do know, though, is that human activities are causing them harm. Although the oceans are immense, they are also in need of protection. The countries of North America have always had plentiful natural resources. But the exploitation of these resources comes at a cost, and in certain cases, some have wondered if that cost is too high. North American Natural Resources explores all facets of this vital aspect of our economy. Readers will investigate the natural history, human use, technology, environmental impact, and economic significance of the most significant resources on the continent.