Global Warming

How to respond to people who doubt the human impact on the climate Getty Images Dear EarthTalk: I keep meeting people who say that human-induced global warming is only theory, that just as many scientists doubt it as believe it. Can you settle the score? - J. Proctor, London, UK So-called “global warming…

Tropical forest trees, like all green plants, take in carbon dioxide and release oxygen during photosynthesis. Plants also carry out the opposite process, known as respiration, in which they emit carbon dioxide, generally in smaller amounts than taken in during photosynthesis. The remaining carbon is…

By Larry Vardiman, Ph.D. * Introduction In the latest of my series of articles on global warming, I offered evidence that global warming appears to be occurring, but evidence seems to be growing that fluctuations in the electromagnetic field of the sun may be responsible for it.1 Here I would like to…

A small handful of companies are responsible for the majority of the greenhouse gas emissions causing global warming. In fact, just 90 fossil fuel companies account for almost two-thirds of carbon dioxide emissions since the beginning of the Industrial Revolution. Rescue workers, local volunteers and…