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.
Directions. 1  Finely chop the garlic, chilli's and ginger and fry for approx 1 minute in 2 tablespoons of the vegetable oil in a large wok / casserole dish. 2  Finely chop the onion and add to the above, frying for 10 minutes until the onions are transparent.  Add the tomatoes and simmer for 5 minutes.