The tropical rain forests of the world are disappearing at an astonishing rate. Most of the destruction has occurred within the last 30 years. The fragility and diversity of these complex ecosystems are examined in "Tropical Rain Forests: A Disappearing Treasure" now at the Natural History Museum of Los Angeles County in Exposition Park.
Organized by the Smithsonian Institute and the World Wildlife Fund, the exhibit uses dioramas, photomurals, models and multimedia presentations to illustrate the interrelationship between our use of daily products and the deforestation.
The museum will have lectures, classes and other activities in conjunction with the exhibit, which runs through May 27. Call (213) 744-3466.
Oncologist Patricia Ganz will discuss her current research with breast cancer patients and treatments at the monthly meeting of Breast Cancer Recovery Plus, a peer support group, at 2 p.m. March 17 at the Mercury Savings & Loan office in West Los Angeles. (213) 478-9463 or (213) 452-0200.
The "Cholesterol Controversy" will be discussed by internist Gerald Leve in a lecture sponsored by Kinneret Hadassah at the Islander Marina in Marina del Rey Tuesday at 1:30 p.m. (213) 856-9317.
Stanford Prof. Anne Ehrlich will discuss the military impacts on the environment in a lecture sponsored by the Sierra Club's Nuclear Issues Committee at the Unitarian Church in Santa Monica at 7:30 p.m. March 16. (213) 395-6762.
A wide range of global and local ecological issues will be investigated in "The Environment: The Next 60 Years" at Santa Monica College March 20-23. The oceans and coastlines, environmental hazards and the poor, and post-Cold War environmentalism are some of the topics that will be examined in the special four-day program. (213) 452-9209.
Over 35 exhibitors will display living and preserved insects at the fourth annual Lorquin Entomological Society Insect Fair March 17 and 18 at the Los Angeles State and County Arboretum in Arcadia. In addition to the exhibits, several of which are designed specifically for children, there will be demonstrations, scientist-led activities, speakers and a symposium. (213) 744-3559 or (818) 446-8251.
A long-term study of seashore animal populations on the Palos Verdes Peninsula will be extended to allow public participation in the joint project of the Cabrillo Marine Museum and Cal State Long Beach. An orientation class will be held at the museum from 1 to 4 p.m. March 17 followed by field surveys on March 22, 23, 24, and 25.
On March 18, museum staff members will lead visitors, including families, on a walking tour of the Cabrillo Beach area from 9 a.m. to noon. Reservations required. For information, call (213) 548-7563.