"Letter from a Birmingham Jail," penned by Martin Luther King, Jr., in 1963, is a classic defense of __________

Major UN environmental conferences:

A. have been largely successful in establishing environmental regimes. B. take place almost every year. C. have had difficulty implementing resolutions. D. are seldom attended by the major polluting countries. E. typically consist just of political posturing.

Biological and chemical weapons share which of the following characteristics?

a. They are regarded as a "poor man's atomic bomb". b. They can cause widespread injury and death. c. They are prohibited by international law. d. All these are characteristics of biological and chemical weapons.