ISBN-13: 9780367573942 / Angielski / Miękka / 2020 / 638 str.
ISBN-13: 9780367573942 / Angielski / Miękka / 2020 / 638 str.
A variety of air pollutants are emitted into the atmosphere from human-caused and natural emissions sources throughout the United States and elsewhere. These contaminants impact sensitive natural resources in wilderness, including the national parks. The system of national parks in the United States is among our greatest assets. This book provid