Describe Earth's distance to the Sun compared to other stars in our galaxy

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

Why are current extinctions of concern to enviromentalists?