Global Warming (Science Concepts Second)

Wouldn't it be great to control the weather? To make every weekend warm and sunny, or bring on a snowstorm at will? While unfortunately humans lack this power, we all still affect the climate on Earth. Scientists have studied a warming trend on our planet that started back in the 1800s and dramatically increased in the 1980s. They have traced this warming of Earth to greater amounts of carbon dioxide and other gases in the atmosphere, some of which is a direct result of human activity. Well-known science writers Alvin and Virginia Silverstein and Laura Silverstein Nunn explain how human activity and the greenhouse effect have changed the climate on Earth and the effect this has on people and animals. The authors also explore ways that everyone can "go green" to help fight global warming.