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Foam board is ideal for presentations, signs and school projects. Lightweight, rigid design resists warping. Smooth, clay-coated surface can be screen painted or used for mounting. Foam board is cut easily to the size you need. Resilient, 3/16" thick core resists dents and is free of chlorofluorocarbons (CFC-free).

James Lovelock is a world-renowned scientist and inventor whose work on detecting CFC's (chlorofluorocarbons) in our environment led him to develop a new theory about our planet. The Gaia Hypothesis posits that the Earth is alive-a self regulating organism in its own right. In his two other books on the subject, Lovelock set the record straight on the damage that CFC'c have done to ourplanet and its delicate balance of the interaction between life-forms. His theory has generated much controversy as it proposes that evolution is far from over and that humankind is no longer the be-all and end-all of that process. In this latest volume on the subject, Lovelock examines the health and future prospects of our ailing planet. Beautifully illustrated and presented, Healing Gaia does justice to a theory of this magnitude, while making it accessible to a wide audience of scientists and non-scientists alike. It represents the most comprehensive analysis of our origins, our reasons for existence, and our likely future.

A look at the damaging effects of chlorofluorocarbons on the atmosphere discusses the history of CFCs in industry, the discovery of the hole in the ozone layer in 1974, and the battle to restrict CFCs. 20,000 first printing.

We drive cars with "Save the Whales" bumper stickers, buy aerosol sprays that advertise "no chlorofluorocarbons," and wear T-shirts made from organically grown cotton. All of these "earth friendly" choices and products convince us that we are "thinking globally, acting locally" and saving the planet. But are we really? In this provocative book, J. Robert Hunter asserts that using catchy slogans and symbols to sell the public on environmental conservation is ineffective, misleading, and even dangerous. Debunking the Fifty Simple Things You Can Do to Save the Earth approach, Hunter shows that there are no simple solutions to major environmental problems such as species extinction, ozone depletion, global warming, pollution, and non-renewable resource consumption. The use of slogans and symbols, Hunter argues, simply gives the public a false sense that "someone" is solving the environmental crisis—while it remains as serious now as when the environmental movement began. Writing in plain yet passionate prose for general readers, he here opens a national debate on what is really required to preserve the earth as a habitat for the human species.

This book describes mathematical techniques for interpreting measurements of greenhouse gases in order to learn about their sources and sinks. The majority of the book gives general descriptions of techniques, but the last third covers the applications to carbon dioxide, methane, chlorofluorocarbons and other gases implicated in global change.