Overall, environmental science is the field of science that studies the interactions of the physical, chemical, and biological components of the environment and also the relationships and effects of these components with the organisms in the environment.
1 Add sliced onions to a medium bowl. 2  Pour enough boiling water over onions so that they are covered. 3  Count to 10 then drain. 4  Add onions to glass jars or a bowl. 5  Toast cinnamon, cloves and the red pepper flakes in a small saucepan over medium heat until fragrant, 3 to 5 minutes.
1 Place onion slices in a medium bowl. 2  Pour vinegar and 1/2 cup warm water over onion. 3  Stir in sugar and season with salt; let stand until slightly pickled, about 30 minutes.4  Drain. 5  DO AHEAD: Can be made 2 days ahead. 6  Let cool slightly. 7  Cover and refrigerate. Place onion slices in a medium bowl. 2  Pour vinegar and 1/2 cup warm water over onion. 3  Stir in sugar and season with salt; let stand until slightly pickled, about 30 minutes. 4  Drain. 5  DO AHEAD: Can be made 2 days ahead.