They worry about energy that comes from nonrenewable or finite sources, since they will run out
Chemical bonds are broken to supply us with energy. Without bonds, and our ability to break them, the food we eat would not supply us with energy.
There are a lot of people in the world, but they are not all there to supply the US with energy. The US will have to obtain what it needs by normal commercial methods, the days of empire are over in today's world.
Sunlight, used for solar energy, is a form of renewable energy. Renewable energy is energy with a practically limitless supply, at least within a normal scale of time. The sun will continue to give energy without stop for a longer amount of time than we need to worry about so it is renewable.
They supply energy but not fibre.
by the forms of energy the biogas supply farmers with the energy they need.
It doesn't supply the most energy, but it does supply long term energy
They supply energy for humans, since we eat sunflower seeds.
they don't have to run around collecting food and stuff having to worry if they will go hungry that night
Milk has cream which has fat in it that is why milk supply's energy and water does not.
We cry to discharge emotional energy, which is a good thing. Many people cry when they are angry, frustrated, stressed...there are a variety of reasons. Crying is good for you. Don't worry about it, worry about the causes of the stress.
If the earth's supply of energy stopped, Caveman time!
They supply ATP to the cell.ATP is the currency of energy.