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 Stir in onion; cook for 5 minutes, until onions are translucent and begin to brown. 2  Add garlic, stir for about a minute. 3  Stir in 1 1/2 tablespoons flour; cook and stir for about 1 minute.4  Add tomato paste, and cook for another minute.5  Slowly add chicken stock, stir to combine, and return to a simmer. Stir in onion; cook for 5 minutes, until onions are translucent and begin to brown. 2  Add garlic, stir for about a minute. 3  Stir in 1 1/2 tablespoons flour; cook and stir for about 1 minute.