No it is not the main energy source
Answer:
Explanation:
According to USDA food profiling facts for Americans, people were consuming 3800 calories per person per day in year 2000, this was 800 calories more than what they consumed in 1957. The trend is definitely on rise and you can calculate from these number the percentage of increase.
The energy needed to raise the temperature of 1 kilogram of water through 1 °C, equal to one thousand small calories and often used to measure the energy value of foods
Using protection like condoms and getting tested regularly
