Pick of the paperbacks; The Wooing of Earth, by Rene Dubos. New York: Charles Scribner's Sons. $4.95.

This eminent microbiologist and Pulitzer-winning author assures us that human beings can improve on nature. They can make the environment more livable and more meaningful -- and grander than it could ever be on its own. And this is where Dubos parts company with ecologists who look down their noses at man's "interference" with nature.

While admitting that the human touch can blights as well as brighten, in "The Wooing of Earth" Dubos sets out to celebrate our most successful interplays with our planet. These can help us enhance not only the natural world, he believes, but the prospects for survival of our own endangered species.