Which of the following situations is an example of environmental racism? a. toxic facilities are usually located in the poorer areas of communities. b. educational programs often include information on pollution. c. plants and trees remove carbon dioxide from the air. d. all of the above are correct.

Estimate the kinetic energy of mars with respect to the sun as the sum of two terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. (assume mars is a uniform sphere with mass = 6.4×10 to the power of 23 kg, radius = 3.4×10 to the power of 6 m, rotation period = 24.7 hours, orbital period = 686 days and is 2.3×10 to the power of 8 km from the sun.)