Filter By Subjects
Air pollution Atmosphere Climate Climatic changes Ecosystem management Physical geography WeatherFilter By Subjects
Air pollution Atmosphere Climate Climatic changes Ecosystem management Physical geography WeatherSummary: Three billion years ago, bacteria polluted the atmosphere with a new gas, oxygen, and changed the planet forever. This new "poison" gas became the catalyst for life to emerge. But today, humankind is also creating new gases, along with altering the composition of the atmosphere by building dams and removing forests. This program examines the possible consequences of our actions.
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2007
View online at AVOD
Summary: A life-sustaining envelope of gas surrounds the earth. This atmosphere contains oxygen, CO2, water vapor, and other gases-it is what generates climate, which affects all living beings. This program analyzes the sun's gradual brightening and the relationship between sunlight and CO2, explains why the atmospheres of Mars and Venus cannot sustain life, theorizes about the disappearance of...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2006