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 onions to glass jars or a bowl. 2  Toast cinnamon, cloves and the red pepper flakes in a small saucepan over medium heat until fragrant, 3 to 5 minutes. 3  Whisk in vinegar, lime juice, a 1/4 cup of the sugar and salt. 4  Bring to a simmer and cook until sugar and salt have dissolved, 1 to 2 minutes.
1 Caramelize the onions: Check the onions every 5 to 10 minutes. Stir the onions and scrape up any fond that forms on the bottom of the skillet. â¢  Around 10 Minutes: Onions will start to soften and turn translucent in spots. They will release a lot of liquid into the pan.